# find the derivative of y=(3x+1)^2 y= square root 13x^2-5x+8

97,722 questions, page 57-
## Physics

Two idencial point charges (q = 7.40 x 10^-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.440m. A test charge (q = -2.30 x 10^-8 C), with a mass of 7.25 x 10^-8 kg, is released from rest at one of the empty corners of the

*asked by Allee on February 3, 2010* -
## PreCalculus

Problem: Identify the conic from the equation 13x^2-6(sq.rt.6)xy+7y^2-16=0 I have to choose from the following four answers: hyperbola (angle of rotation 45) hyperbla (angle of rotation 60) ellipse (angle of rotation 90) ellipse (angle of rotation 30) I

*asked by Joanie on March 30, 2009* -
## Algebra

I am not understanding these kinds of problems: I cannot simplify with understanding. 7 times the 4th root of m^3 plus 9 times the 4th root of 256m^3.

*asked by Taurus on April 19, 2012* -
## reading

What is the prefix suffix and root for previous? Am i correct? No prefix No suffix Root- previous Answer ASAP PLZ

*asked by 🐶 on October 14, 2015* -
## Calculus

Consider the curve defined by y + cosy = x +1 for 0 =< y =< 2pi.... a. Find dy/dx in terms of y. *I got 1/(y-siny) but I feel like that's wrong. b. Write an equation for each vertical tangent to the curve. c. find d^2y/dx^2 in terms of y. d. Sketch a graph

*asked by Penny on January 24, 2012* -
## calculus

Each of the sides of a square (S) with an area of 16 is bisected and a smaller square (S2) is constructed using the bisected parts as vertices. The same process is carried out on S2 to construct an even smaller square (S3). What's the area of S3? (Draw a

*asked by Ian on June 5, 2012* -
## Math

Barbara is tiling her craft room with square tiles. She wants 6/10 of the square tiles to be red. If she used 18 red tiles, how many square tiles will be used to cover the floor . Draw an area model to help solve

*asked by Judy on February 27, 2017* -
## Math

If area of a square inscribed in a semi circle is 2 square centimeter. Fine the are of the square inscribed in a full circle

*asked by Shankar on December 31, 2016* -
## Pre-Cal

I've been trying to work this problem out for the past week and still havent managed to get to the answer. jeans unlimited sold 6000 pairs of jeans in october at an average of 44$ each. The company president decides that she must increase the company's

*asked by Chloe on October 8, 2010* -
## maths

given 1,0.5,4,o.25,7,0.125,10 assume this pattern continues consistently 1.write down the 33th term in this sequence 2.determine the sum of the first 24 terms in this sequence.give the answer to five decimal place 2.1.in a geometric sequence the fourth

*asked by memory on February 15, 2015* -
## Math (Calculus) (mean value theorem emergency)

Consider the graph of the function f(x)=x^2-x-12 a) Find the equation of the secant line joining the points (-2,-6) and (4,0). I got the equation of the secant line to be y=x-4 b) Use the Mean Value Theorem to determine a point c in the interval (-2,4)

*asked by Ray on November 19, 2016* -
## Calculus

Marginal Cost Businesses can buy multiple licenses for data compression software at a total cost of approximately C(x) = 96x2/3 dollars for x licenses. Find the derivative of this cost function at the following values x=8 and x=64 I do not know where to

*asked by Sarah on February 5, 2013* -
## Calc 1 (Optomization)

A rectangular storage container with an open top is to have a volume of k cubic meters. The length of its base is twice its width. The material for the base costs $6 per square meters and the material for the sides costs $10 per square meter. Find the

*asked by Nick on April 6, 2012* -
## Calculus Part 2

y = tan(sqrtx) Find dy/dx. So I found it and I got the answer as sec^2(sqrtx) but the answer is (sec^2(sqrtx))/2(sqrtx)...why? ---------------------------------- 2) Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at

*asked by Samantha on November 4, 2008* -
## Geometry

Circle O is inscribed is square ABCD, and at the same time, is circumscribed about square PQRS. WHich are is the smaller area, the region inside the inscribed circle minus the area of square PQRS or the are inside square ABCD minus the area of the

*asked by Anonymous on May 20, 2012* -
## algebra

I have to find the square footage of my kitchen floor with the length of one side being 8 inches. So, now I know I can make X=8. f(x)=x^2 is the template needed for this solution. If f(8)= the square footage of my kitchen floor, what will my answer be?

*asked by Carly on March 2, 2011* -
## Algebra

A community group is planning the expansion of a square flower garden in a city park. If each side of the original garden is increased by 9 meters, the new total area of the garden will be 169 square meters. Find the length of each side of the original

*asked by Sandra on April 4, 2014* -
## Calculus

A rectangular storage container with an open top is to have a volume of 10 . The length of its base is twice the width. Material for the base costs $12 per square meter. Material for the sides costs $5 per square meter. Find the cost of materials for the

*asked by John on July 19, 2017* -
## math

The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 18 square yards 54 square yards 108 square yards 324 square yards

*asked by Keon on July 20, 2015* -
## math

Ok The Galtins are buying a carpet for their home. They need about 1,175 square feet of carpet. The carpet they buy is sold by the square feet. What is the estimate of number of yards the Galtins need for thier home? divide square feet by 27 to get square

*asked by oath on March 1, 2007* -
## Chemistry problem

The formula for the Maxwell-Boltzmann distribution is given below,where y is proportional to the fraction of particles of molecular mass m at temperature T traveling at speed u. The expression frac(u1,u2) gives the fraction of particles between speeds of

*asked by windal on April 25, 2016* -
## Physics - Center of Mass

A square aluminum plate (volume mass ρ = 2700 kg/m^3) has dimension L = 4.8 m and e = 0.9 m. A cylinder of radius R = 1.5 m and at a distance d = 1.2 m from the center of the plate and at 20 deg with the horizontal, is removed from the plate. Find the

*asked by Kid on August 24, 2017* -
## Calculus

A rectangular box is to have a square base and a volume of 20 ft3. If the material for the base costs 37¢/square foot, the material for the sides costs 10¢/square foot, and the material for the top costs 13¢/square foot, determine the dimensions of the

*asked by Anonymous on June 17, 2013* -
## Math

Prove that (4tanx(1-tanx)square)/((1+tanx)square)square=sin4x

*asked by Ivan h on April 23, 2017* -
## Math

A banner is 15 square feet. How many square inches are equivalent to 15 square feet?

*asked by Amy on October 28, 2014* -
## 6th grade math

How do you do square route i know a little like square route of 9 is 3 but i need more practice with square routes do you know any websites that can help.

*asked by Annomynus on May 2, 2013* -
## math

The area of a square is 36 square feet. Each side of the square measures_____ feet.

*asked by hannah on July 1, 2016* -
## math(mechanics 1)

a car traveling on a straight road accelerates uniformly at a meter per second square from its initial speed of 20 meter per second until it reaches a speed of 30 meter per second. the car travels at this speed for 600 meter and then decelerates uniformly

*asked by maha on March 4, 2012* -
## Calculus

For the function below, determine the intervals of concavity: f(x)=xlnx I tried doing it but the second derivative would always be f''(x)=1/x, so it would be concave up at x>0 and concave down at x

*asked by Isabella on January 10, 2016* -
## Statistics

A linear regression of price on square footage of homes for sale found the equation price = 30275 + 144*sqft. In this equation, the slope means A. a house with no square feet will cost $30,275. B. for every 144 square feet, average price goes up $30,275.

*asked by Macy on February 15, 2015* -
## Geometry

A company produces cardboard boxes with the top, bottom and sides measuring 5 feet. It costs the company 4 cents a square foot to make each box. The square footage is determined by finding the area of all six sides of the box. Find the cost to make 100

*asked by Jack on August 27, 2011* -
## Calc 1

A rectangular storage container with an open top is to have a volume of 10 m3. The length of the base is twice the width. Material for the base is thicker and costs $13 per square meter and the material for the sides costs $10 per square meter. Find the

*asked by TayB on May 3, 2015* -
## maths

a ladder 12 m long rests aganist a wall if it reaches the wall at a height of root 63m then find the angle of elevation

*asked by meena on January 8, 2016* -
## Science

A person moves 30m north, then 20m east and finally 30 root 2m south west. Find the displacement of the person.

*asked by Jayanta on July 7, 2016* -
## Calculus II

Compute the first 5 terms of the sequence: {b(n)}n=1¨‡ = nã6n + (5/6)^n. ((that is:(Bsub(n))from n=1 to infinity = nth root of 6n + (5/6)raised to n.)) If the sequence converges, find the limit.

*asked by chelsea on April 14, 2014* -
## Cal 1

Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 1 = 0, x_1 = −3

*asked by Dee on March 7, 2013* -
## math 111 urgent please help

Find a degree 6 polynomial with - 8 as a root, no other roots, and in which the coefficient of x^6 is 16. Assume that all (non-constant) factors of the polynomial correspond to real zeroes.

*asked by Eileen on November 4, 2010* -
## Math urgent

Find a degree 6 polynomial with - 8 as a root, no other roots, and in which the coefficient of x^6 is 16. Assume that all (non-constant) factors of the polynomial correspond to real zeroes.

*asked by Eileen on November 3, 2010* -
## ISBM

CASE STUDY : 2 The price P per unit at which a company can sell all that it produces is given by the function P(x) = 300 — 4x. The cost function is c(x) = 500 + 28x where x is the number of units produced. Find x so that the profit is maximum. Question:

*asked by Raja on January 11, 2016* -
## calculus

Find the area of y=cute root of (2x), y=(1/8)x^2, 0 less than or equal to x less than or equal to 6

*asked by Anonymous on November 12, 2018* -
## HELP!!!!

Darnell used one small can of polyurethane to seal a square patch of his hardwood floor. The can advertised coverage of 50 square feet. What is the approximate side length of the square Darnell sealed? a)7 feet b)8 feet c)25 feet d)49 feet

*asked by Dezzy on April 8, 2011* -
## Math

The length of time (T) in seconds it takes the pendulum of a clock to swing through one complete cycle is givenby the formula T=2pi square root of L divided by 32 where L is the length in feet, of the pendulum, and pi is approximately 22 divided by 7. How

*asked by Carolyn on April 16, 2011* -
## algebra

The Length of time (T) in seconds it takes the pendulum of a clock to swint through one complete cycle is given by the formula T=2pie square root of 7 divided by 32 where L is the length in feet, of the pendulum, and pie is approximately 22 divided by 7.

*asked by Carolyn on April 16, 2011* -
## Calculus (Help)

The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur. What the derivative of the function?

*asked by Lerinda on October 25, 2012* -
## Calculus (Help)

The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur. What the derivative of the function?

*asked by Lerinda on October 25, 2012* -
## math

The perimeter of a square piece of land is twice the perimeter of an equilateral triangle. (an equilateral triangle has three equal sides.) If one side of the square is 45 feet, find the length of the sides of the triangle. 2x + 3 = 45 2 x + 3 -3 = 45 + 2x

*asked by Semra on September 10, 2014* -
## college algebra2

the area of a quadrilateral is 200 square feet and its longest side is 20 feet long. find the length of the longest side of a similar polygon whose area is 400 square feet.

*asked by misha on February 12, 2016* -
## math

A water tank can be constructed with a metal top and two square ends that holds 16 cubic meter of water and requires 40 square meter of metal. find the dimensions of the water tank.

*asked by kgosi on April 25, 2013* -
## CALCULUS - need help!

this was on the math test that i got wrong... The position equation for the movement of a particle is given by s=(t^2-1)^3 when s is measured in feet and t is measured in seconds. Find the acceleration at two seconds... i found the first derivative but i

*asked by Anonymous on November 18, 2007* -
## Algebra

Hiya. I have 7 expressions that I have been asked to simplify. I worked all of them out, and if you could, I'd like you to check my work for me. Here they are: 1. (x^2 + 3x - 9) + (-4x^2 + 2x - 3) My answer: -4x^4 + 5x - 12 2. (x - 2)(3x + 5) My answer:

*asked by Kathy on February 20, 2014* -
## 8 th grade math

each side of square is 6 in. long . a scale factor of 2/3 is used to draw a similar square. how long is each side of similar square . choices are 4in. ,6 in., 8in. ,answer not here i chose 8 in. is that right

*asked by Anonymous on May 14, 2012* -
## Math(Please check)

This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did I do this correctly? sin

*asked by Hannah on September 13, 2012* -
## calc

find the values of a nad b if the function f(x)=2x^3 + ax^2 + bx + 36 has a local max when x=-4 and a min when x=5 First you calculate the derivative: f'(x)=6x^2 + 2ax + b (1) At the local maximum and minumum f' is zero. If a polynomial is zero at some

*asked by kooldude on November 9, 2006* -
## maths2

Use the discriminant to determine the number of real roots the equation has. 7x2 + 3x + 1 =0 A. One real root (a double root) B. Two distinct real roots C. Three real roots D. None (two imaginary roots)

*asked by mdan on October 7, 2013* -
## mathematics

Use the discriminant to determine the number of real roots the equation has. 3x2 – 5x + 1 =0 A. One real root (a double root) B. Two distinct real roots C. Three real roots D. None (two imaginary roots)

*asked by mdan on October 7, 2013* -
## Operation

Parsa Real Estate is a company that buys and rents real estate. The company is looking into buying an office building for $1M.Thebuilding has 10,000 square feet of rentable office space. The company analysts predict that they can rent the office space for

*asked by Nilu on October 28, 2013* -
## Maths

Find the number of decibels of sound produced by a jet engine at a distance of 50 metres if the intensity is 10 watts per square metre. This time I'll post the given formula too. Sorry to leave it out before! The dB scale for measuring loudness, d, is

*asked by Donna on February 15, 2014* -
## Math

Suppose you want to use hardwood flooring for most of a 750 square foot apartment. Labor costs are $250 plus a $2 feet per square foot of installation. The cost per square foot of hardwood flooring is $7.00. Write an inequality to show the square feet in

*asked by Helene on December 3, 2010* -
## Calculus

Given the equation xy = 2, set up an integral to find the length of path from x = a to x = b and enter the integrand below. I did the integral from b to a and set it equal to the sqrt(1+4/x^4), because I found y to equal 2/x and the derivative to be

*asked by Katelyn on March 13, 2009* -
## Derivative Test

Consider the function y = 3x5 – 25x3 + 60x + 1. Use the first or second derivative test to test the critical points. How many relative maxima did you find? I got 2 as the relative maxima, is this done correctly?

*asked by May on December 9, 2014* -
## Math

Can someone please check my answers? A yard has a square gate that has an area of 8 square meters. 1. What is the height of the gate in meters? Answer: 28 meters 2.How many feet would that be? Answer: 8.4 feet 3. If each side was 1 foot longer, what would

*asked by Chloe on April 28, 2015* -
## Math

Thr number cube shown is rolled and the spinner shown is spun. Find P(an odd number and yellow). The cube shows the numbers 1,5,3. The color on the top left square is yellow, the bottom left squares color is blue, the color on the top right square is

*asked by Sonali on April 8, 2015* -
## Math

The quotient equals the divisor, then the dividend equals the (A) square root of the divisor (B) divisor (C) divisor^2 (D) quotient

*asked by Jeana on August 4, 2015* -
## Math-12th grade

#1. The pressure P of a compressed gas is inversely proportional to the volume V. If there is a pressure of 35 pounds per square inch when the volume of gas is 400 cubic inches, find the pressure when the gas is compressed to 100 square inches. #2. A

*asked by Mary on September 9, 2010* -
## Math Word Problems

#1. The pressure P of a compressed gas is inversely proportional to the volume V. If there is a pressure of 35 pounds per square inch when the volume of gas is 400 cubic inches, find the pressure when the gas is compressed to 100 square inches. #2. A

*asked by Carmen on September 1, 2010* -
## Math

Nathan plants equal sized square of sod in his front yard each square has An area of 6 square feet Nathan plants a total of 1,000 squares in his yard what is the total area of the square sod

*asked by Kayla on September 18, 2016* -
## Calculus

find the derivative y= csc^-1 (secx) 0 less than or equal to x less than or equal to 2¤Ð what did i do wrong? - 1/ secx sqrt(secx^2 -1) * secxtanx

*asked by Jin on October 29, 2010* -
## math

Mark has a square shaped tulip bed in his garden. The area of the tulip bed is 400 square feet. Mark wants to put a low border fence around the tulip bed. Explain how to find the number of feet of fencing that he will need.

*asked by HELP!!! on February 2, 2012* -
## nursing

A patient had a cystectomy. What does the root of this word mean? A. Kidney B. Tube C. Bladder D. Meatus I chose C A pyelogram was performed on a 43-year-old patient. The root word means A. trough, basin, pelvis B. ureter, urethra C. bladder, urine D.

*asked by Mel on August 7, 2010* -
## Calculus

AM having problems understanding what equations to use for this word problem. Please help. A rectangular storage container with an open top is to have a volume of 48ft^3. The length of its base is twice the width. Material for the base costs $8 per square

*asked by Gaby on March 11, 2012* -
## Calculus

A manufacturer needs to produce a cylindrical can with a volume (capacity) of 1000cm cubed. The top and the bottom of the container are made of material that costs $0.05 per square cm, while the side of the container is made of material costing $0.03 per

*asked by sam on March 30, 2017* -
## Calculus

A manufacturer needs to produce a cylindrical can with a volume (capacity) of 1000cm cubed. The top and the bottom of the container are made of material that costs $0.05 per square cm, while the side of the container is made of material costing $0.03 per

*asked by Rachel on March 30, 2017* -
## Math

A rectangular box is to have a square base and volume of 78 feet cubed. If the material for the base costs $.30 per square feet, the material for the sides costs $.10 per square foot, and the material for the top costs $.20 per square foot. Determine the

*asked by Josh on October 13, 2015* -
## math

PLEASE HELP I WOULD REALLY APPRECIATE IT! 1. Write an expression to describe a rule for the sequence. Then find the 100th term in the sequence. 3,10,17,24,31,38 ANSWERS: A) n+7;707 B) 7n:700 C) 7n-4;696 ** D) 6n-4;596 2. Write a rule for the function

*asked by anonymous on May 14, 2015* -
## Math

The area of square 1 is 4. The perimeter of square 2 is tree times the perimeter of square 1. What is the area of square 2?

*asked by Jeana on August 2, 2015* -
## math

Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2) with x ≠ 2. Find all values of x where the graph of g has a critical value. For each critical value, state whether the graph

*asked by Gary on March 16, 2015* -
## Calculus

Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 8 = 0, x1 = −3 I got -3.4808, but it's wrong. Help?

*asked by Benny on November 4, 2014* -
## Calc 1

Use a graph to give a rough estimate of the area of the region that lies beneath the given curve. Then find the exact area. y = 5th root(x), 0 ≤ x ≤ 32

*asked by TayB on May 14, 2015* -
## Calculus 1

Use a graph to give a rough estimate of the area of the region that lies beneath the given curve. Then find the exact area. y = cube root(x) , 0 ≤ x ≤ 27

*asked by TayB on November 25, 2015* -
## polynomials

i also have theses to solve Factor the polynomial x2 + 5x + 6 completely Solve the given equation by using the quadratic formula. x2 – 7x – 4 = 0 What value is under the square root (or radical) in your answer? (Note: You are asked to identify only the

*asked by mike on May 15, 2007* -
## Algebra 0110 College

1) A rectangle has perimeter 38 feet and an area of 78 square feet. Find the dimensions of the rectangle assuming the width is smaller than the length. L= W= 2) A rectangular canvas picture measures 9 inches by 7 inches. The canvas is mounted inside a

*asked by Quince on October 15, 2013* -
## Maths

Judy made a rectangular shaped figure of dimensions 20cm by 5cm with a piece of clay . She then took the same amount of clay and made a square figure. If the thickness of the square is the same as that of the rectangle, calculate the length of one side of

*asked by Rachel on May 27, 2017* -
## math

The cost of ploughing a square farm is the same as ploughing another farm that is rectangular in shape.the rate of ploughing is the same in both the cases. The side of the square farm is 20m and the length of the rectangular farm is 40m. Find the breath of

*asked by toufeeq on February 16, 2016* -
## Math

Find the derivative of y=(sinx/(1+cosx))^2. I used the chain rule, but the second part involved the quotient rule which gives a very complicated expression that u do not know how to simplify. Could you please give me a detailed step by step solution for

*asked by Beth on December 27, 2015* -
## Caculus

y = 500/1+75e^-.625 x = egg mass y = number of tree (thousand) The function is show the forest defoliation1. Find the percent of forest defoliation if the egg mass are 100? (Using derivative) Thank you

*asked by alex on November 2, 2011* -
## calc

Find an equation of the tangent line to the curve at the given point. y = 6 x sin x P= (pi/2 , 3pi) i know the slope of a tangent line is equal to the first derivative. For that I got 6xcosx + 6sinx but idk how to put that into the y-y1=m(x-x1) formula to

*asked by calc on September 14, 2010* -
## MATH HELP NEEDED

Sarah has a rectangular corral for her horses. She wants to put new rail fencing all around the corral. What total lenght of fencing will she need. Description of the corral: in my book it is square and around the square is a length of 28m and inside the

*asked by elina MS Sue Please Help Me on June 11, 2009* -
## What does this Maths B question mean?

How do I do thi question? An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The

*asked by Nina on July 28, 2012* -
## Math

A square picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. Find the area of the mat that will remain uncovered by the picture.

*asked by Anonymous on February 3, 2019* -
## Ms. Sue Please help!!!

Ahhh... thank you "A square and an equilateral triangle have the same perimeter. Let A be the area of the circle circumscribed about the square and B be the area of the circle circumscribed about the triangle. Find A/B." It's a tough one.

*asked by Sheenybeany on June 10, 2014* -
## math

Given z(t) = square of t +1− t^3 , find z(2).

*asked by Pam on April 13, 2015* -
## Pre Calculus

A cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0.02 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per

*asked by Joey on April 29, 2016* -
## algebra

Megan factored the expression3x^2-23x+14 as (x-2)(3x-7) . But when Jacob applied the FOIL principle and multiplied out (x-2)(3x-7) , he got 3x^2-13x+14 ; thus, Megan’s solution does not appear to check. Why is that? Please help Megan to understand this

*asked by kozy on April 28, 2011* -
## math

suppose you are drinking root beer from a conical cup. the cup has a diameter of 8 cm and a depth of 10 cm. as you suck the straw, root beer leaves the cup at the rate of 7 cm^3/second. at what rate is the level of the liquid in the cup changng when the

*asked by stephen on January 1, 2011* -
## Calculus

This is a large problem, sorry for the trouble. if f(x) = sqrt(x^3 + 5x + 121)(x^2 + x + 11) Find fprime/derivative of/at 0 I keep getting 16 which is not one of the multiple choice answers available. My last step is [sqrt(121)(1)] + [{5/sqrt(121)}(11)]

*asked by Anonymous on October 29, 2008* -
## Math HElP!!!!!!!!

A group of students decided to look at rectangles that are spuare. They find that no matter what size square they drew, every square was similar to shape B in the Shapes Set and to all other squares. They found that all squares are similar! They decided to

*asked by chemiii on December 4, 2006* -
## Engineering

-From the following two linear homogeneous algebraic equations:(sqr= square root) (1) B*sin(kl/sqr2) = D*sin(kl) (2) (k/sqr2)*B*cos(kl/sqr2) = (k)*D*cos(kl) -Form matrix of these 2 equations and solving the determinant=0 will lead to:

*asked by Chris on October 30, 2011* -
## MATH981

what is the derivative of f(x)= x ... is it 1??

*asked by Anonymous on December 11, 2011* -
## calculus

what is derivative of (1-2x)^-1? is it -1/(1-2x)^2 ?

*asked by Laura on May 9, 2009* -
## math

the second derivative of f(x)=ln(x^2+1)

*asked by selina on December 27, 2015*

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