# Pre- Calculus

21,305 results, page 67

### Calculus 1

simplify the expression. cos(2 tan^-1 x)

### integral calculus

integrate. (1):sin2xcos3x (2):5(cos3x)^2

### Calculus

Differentiate y=[(8x-x^6)/(x^3)]^(-4/5) My answer: [4x^3(16+3x^5)]/5 • fifth root of [(8x-x^6)/(x^3)] ^9

### calculus

Find the exact length of the curve. x=(y^4)/8+1/(4y^2), 1 ≤ y ≤ 2.

### Calculus 1

Find the horizontal and vertical asymptotes of (3x^2-48)/(x^2-3x+10)

### Calculus

limit (x^2+y^2)/(x+y)^2 as (x,y)->(0,0) I don't know how to prove it doesn't exist. Please help!

### math,(integral calculus)

Integrate with respect to x:4x^2.dx

### HELP HELP CALCULUS

y=e^(5e^x) differentiate first and second derivative

### Calculus i need help

Find dy/dx if x^2.y+sin(xy)+y^4.x^2+3xy=5???

### Integral Calculus

Initial Value Problem dy/dx = y^2 -5y+6 y(0)=1

### Calculus

What is the shortest distance from the surface xy+6x+z^2=33 to the origin?

### Calculus 1

find the critical numbers of the function F(x)=x^(4/5)(x-1)^2

### Calculus

Integral sign 8x/(x-1) dx Is it 8x+8ln abs (x-1)+C ?

### calculus

find the area of the region: y=4 y=2sqrt(x) y=3-x

### Calculus need help

Dy/dx=x+x^3/y plz show your work

### Reposting calculus help plz

Dy/dx=(X+x^3)/y help show working

### Another Calculus help plz

Show that if y=tanx/2 dy/dx=1/sinx

### Calculus help!!!

X^2y+sinxy=e^xy i need solution plz

### Calculus

Suppose that f(t)=Qoa^1=Qo(1+r)^t with f(4)=72.2 and f(10)=176.7. Find what a is and what r is.

### Calculus

Reverse the order of the double integral (y+1) dx dy, where -1<= y <= 4 and y - 4 <= x <= 4y-y^2

### calculus

Find the maximum value of the function f(x)=(x^2+9x-3) / x^2

### Calculus

find the point on the plane 5x+4y+z=12 that is nearest to (2,0,1)

### calculus

Evaluate π ∫ tan² x/3 dx 0

### calculus help

integrate:dx/(3x^3-5)^3 help plz show step

### calculus

evaluate the definite integr 2 ∫ 5/(3+2x) dx 0

### calculus

evaluate the definite integr 2 ∫ (x+1/x)² dx 1

### calculus

Find the limit lim x ->0 (sin^2 2x)/(x^2)

### Calculus

given d/dx[f(2x)]=f'(x) and f'(1)=1 find f'(2) the choices are 1/4, 1/2, 3/4, 3/2, or 5/2 if it helpes

### Calculus

Which of the following grows faster than e^x as x--> infinity x^4 ln(x) e^-x 3^x .5e^x

### CALCULUS

State the intercepts, domain and range for y= |0.5x^2-2|.

### Calculus AB

What is an algebraic expression for cot(arccos ((x+1)/2)?

### Calculus AB

If r and s are roots of the pokynomial equation x^2 + bx + c, show that b=-(r+s) and c=rs

### calculus

Find the Maclaurin series of xcos(x^2).

### Calculus

Find arccos (sqrt2/2). Can this be pi/4 and 7pi/4?

### calculus help me

help find dy/dx if y=cot(x+y) working plz

### Calculus

Determine the equation of the tangent to f(x)= (1/x)+x at the point (1,2)

### Differential calculus

Differentiate the following y=root(e^x)/x

### Calculus

Given the vectors u = <−3,7> and v = <5,1>, find -½ u. A. <-1,-4> B. <-4,-1> C. <3/2,-7/2> D. <-3/2,7/2>

### Calculus

Given the vectors u = <−3, 7> and v = <5,1>, find 3u + 2v.

### Calculus

Given: u <-1, 7> and v <4, -3> What is the measure of the angle between them?

### Calculus

How many critical points does the function f(x) = e^x - x^3 have?

### Calculus

Let F(x)=f(x^4) and G(x)=(f(x))^4. You also know that a^3=15, f(a)=2, f′(a)=4, f′(a^4)=12. Find F′(a) and G′(a). I don't even know where to begin.

### Differential calculus

Sketch the graph of the curve y=(x-2)(x+1)(x+3)

### Calculus

Find dz/dy for the following : xln(1-2y) = zsin((x^2)z)-3y+z

### Calculus

Determine the relative extremum for the function , f(x,y)=((x^2)+(y^2))(e^-x)

### Calculus

Given: r = 4/(-2-6sinθ) What is the eccentricity of the function? A. 2 B. -2 C. 3 D. -3

### Calculus 1

In the problem, x and y are differentiable functions of t. Find dx/dt when x = 3, y = 4, and dy/dt= 2. x^2 + y2^2= 25

### Calculus 1

In the problem, x and y are differentiable functions of t. Find dx/dt when x = 3, y = 4, and dy/dt= 2. x^2 + y2^2= 25

### Calculus 1

In the problem, x and y are differentiable functions of t. Find dx/dt when x = 3, y = 4, and dy/dt= 2. x^2 + y2^2= 25

### Calculus

For what value of k will x+k/x have a relative max at x=-2

### Calculus

If u,v, and w are nonzero differentiable functions, then the derivative of uv/w is what?

### calculus

Find the local linear approximation of f(x) = e^(3x) at x = 1. y = e^3 y = e^(3(x − 1)) y = 3e^(3)(x − 1) y = 3e^(3)x − 2e^3

### Calculus

Find the second difference for the sequence. 7, 6, 7, 10, 15, 22, …. A.1 B.2 C.3 D.5

### Calculus

Find a quadratic model for the sequence. -4, -4, -3, -1, 2 A.y = 0.5x^2 - 0.5x - 4 B.y = 0.5x^2 - 1.5x - 3 C.y = 4.5x^2 - 21.5x+21 D.y = -4.5x^2 + 21.4x - 21

### calculus!

use the definition of derivative to find d/dx(1/(3-x))

### calculus

solve for dy/dx=(x^2+y^2)/xy by substitution. Plz help step

### calculus

(2y-1)dy/dx=(3x^2+1) given that x=1 when y=2 plz show step thanks

### Calculus Please Help

evaluate the table and find d/dx [g[f(2x)]] at x=1 f(x) 6,1,6,2 f'(x) 1,2,5,7 g(x) 1,4,4,3 g'(x) 4,5,5,-4

### Calculus

y = 2 cos(5πx) .... whats the period?

### Calculus

Compute F'(-4) where F(x) = x^3 + X^2 (using the definition of the derivative)

### calculus

limx--->3- 5/x-3 I think it is -inf but I don't know how to prove it

### Calculus

Find the derivative of the integral from x to 6 of ln(1 + t^2). My answer is -ln(1+x^2).

### Calculus

Solve the initial value problem. 7x^6-3x^2+5 and u = 1 when x = 1. Is this x^7 - x^3 + 5x - 4?

### calculus

Find the centroid (¯ x, ¯ y) of the region bounded by: y = 6x^2+7x, y = 0, x = 0, and x = 7

### Calculus (related rates)

Find dy/dt when y = 2x2 + 2x + 4 and dx/dt = 14 when x = 7.

### Calculus (related rates)

Find dy/dt where y = 2 sqrt(x)-4 and dx/dt = 9 when x = 4.

### calculus

Evaluate the integral. from 0 to π/2 sin^3(θ)cos^5(θ) dθ

### Calculus

If y′= x(1+ y) and y > -1 , then y = The differential equation dy/dx=y/x^2 has a solution given by:

### Calculus

If y′= x(1+ y) and y > -1 , then y = The differential equation dy/dx=y/x^2 has a solution given by:

### Calculus

Consider the function f(x)= x^3+5 sqrt(x) Let F(x) be the antiderrivative of f(x) with F(10=-9

### Calculus

Determine the remainder for Sn where n=5 or n=9 for the following series. ∑n=1 to ∞ (n^2+1)/(n^4) S5= R5= S9= R9=

### Calculus

At what point is the function y=csc(2x) continuous?

### calculus

Find the interval, I, of convergence of the series n=0 [((-1)^n)(x-5)^n]/(3n+1)

### Calculus

How do we integrate [(cosx)^2(nx)(sin(nx))]/[a-(cos(nx))] dx?

### calculus

Find the derivatives of the following function: i)y=-3x^-3 +2x^-2 + x-2

### Calculus

Find dy/dx for y=3tan^-1(x/2). I know the answer is 6/x^2+4 but I'm stuck at y'=3(1/1+(x/2)^2)(1/2)

### Math/calculus

Graph f (x) = 3cos (4pix -pi/2) -2

### pre-calc

a farmer wants to make a rectangular enclosure using a wall as one side and 120 m of fencing for the other three sides. a) express the area in terms of x and state the domain of the area function b)find the value of x that gives the greatest area. my teacher didn't explain how...

### pre-algebra

Wel-min makes a square quilt that has an area of 100 square feet.It has 25 square blocks, each the same size. What is the legth of each side of a block? A-2 feet B-4 feet C-6 feet D-10 feet

### Pre Calc

From 2 points 400 yards apart on the bank of a straight river flowing due south, the bearings of a point on the opposite bank are 148 degrees and 28 degrees. How wide is the river? I am having a hard time understanding how this is set up. Help please?

### Pre-algebra

I have some practice problems, and I need to have them worked out, showing your work. I will gain a better understanding of these problems by practicing them. Thank you. (6x+1)(x^2-9x+5) (2x^4+3)(4x^3+2) (12y^3+8y^2+20y)divided 2y (6x^2-25x-10) divided by (3x+2) (8x-5)+(7x+4...

### Pre-algebra

I have some practice problems, and I need to have them worked out, showing your work. I will gain a better understanding of these problems by practicing them. Thank you. (6x+1)(x^2-9x+5) (2x^4+3)(4x^3+2) (12y^3+8y^2+20y)divided 2y (6x^2-25x-10) divided by (3x+2) (8x-5)+(7x+4...

### pre calc

The following polynomial approximates the rabbit population in a particular area.? R(x)= -0.121x^5+2.952x^4+3500, where x is the number of years frm 1975. use a graphing calculator to describe the rabbit population from the rears 1975 to 1990. how do you get started with this ...

### Pre Algebra

I have a rectangle that represents one whole. There are three sections that equal 1/3 each. I want to subdivide those sections into even & uneven squares. EX: 1/3 divided by 2 = 1/6 I am having trouble identifying the uneven squares. Could you please show me a few examples ...

### Math Pre- Algebra

Linda reserved two hotel rooms for $75 each room plus a tax of $7.50. Illustrate the Distributive Property by writing two ways to compute the total. What is the total. So I need to get help on this answer stat. This is due tomorrow and I need done. Please and Thank you!!

### Business

1. Career Fairs allow job-seekers to contact several prospective employers in a short time. (T/F) 2. It is illegal for businesses to screen applicants for skills and abilities in pre-employment tests. (T/F) 3. You would study business and economics trends in what part of the ...

### Pre-aljebra

a rectangular dog pen is to be constructed so that one side is against an existing stone wall and the other three sides are to be fenced. of 500 feet of fence is to be used, determine the dimensions and area of the pen with maximum area. I have no idea how to solve this problem.

### pre-algebra

can someone please help me to writ an inequality for this wor problem? Mr.Kirkland receives $13/hr. for regular time (8hr./day) and double pay for working on holidays. He worked on Friday even though it was a holiday. If his week's pay was at least $650, how many hours did he ...

### pre algebra

Twice a number is 60 times more than 5 times the number. what is the number

### Pre-algebra

Jack runs 275 miles per day during soccer season. He has already run 25 miles this morning. He plans to run 2.5 miles each day. What is the fewest number of days he will need to reach his goal?

### pre calc

An open box is formedby cutting squares out of a peice of cardboard that is 18 feet by 26 feet and folding up the flaps. What size corner squares should be cut to yield a box that has a volume of 250 cubic feet

### pre-calc

The radius of the earth is approximately 4,000 miles. The acceleration due to gravity is approximately 32 feet per square second. The mass of the earth is approximately 6 × 10^24 kilograms. Calculate the value of G in units of kilograms, meters, and seconds.

### Pre calc

Find sin(2x), cos(2x), and tan(2x) from the given information. sin(x) = 5/13, x in Quadrant I sin(2x)? cos(2x)? tan(2x)? I honeslty just need one good example of how to do these please show all work and finalize answer

### calculus II

(A) 2 students are sharing a loaf of bread. Student A eats half of the loaf, then student B eats half of what remains, then student A eats half of what remains, and so on. How much of the loaf will each student eat? (B) 2 students are sharing a loaf of bread. Student A eats 2/...

### Pre-Algebra

The grocery store sells kumquats for $4.25 a pound and Asian pears for $2 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $12.

### Math - Pre algebra

Help!!! 1. which of the following is greater than 4.3 x 10>9? a 2.1 x 10>9 b 3.2 x 10>9 c 5.3x 10>9 d 7.4 x 10>8 2. which of the following is less than 6.5 x 10>-5? a 1.4 x 10>-3 b 2.5 x 10-4 c 7.8 x 10-5 d 4.6 x 10>-6 according to the 2010 census the ...

### pre calc

The number of customers that visit a local small business is 29,600 and has been continuously declining at a rate of 2.9% each year. What is the approximate number of customers that visit the business in 10 years

### pre algebra

Julie went to the post office and bought both $0.49 stamps and $0.34 postcards for her office's bills. She spent $62.60. The number of stamps was 20 more than twice the number of postcards. How many of each did she buy?

### pre cal

find the standard form of the equation of a parabola with the vertex (0,0) and the directrix y=6 find the standard form of the equation of the ellipse with center (0,0) and foci at (+- 4square root 3, 0) and verticies (+-8,0)