Thursday

April 17, 2014

April 17, 2014

Number of results: 113,179

**Derivatives (check answer)**

atsa right-a
*Monday, September 17, 2012 at 4:23pm by Steve*

**convert derivatives of x,y,z, to r, Ɵ,z**

convert derivatives of x,y,z, to r, Ɵ,z with chain rule? I want provment rules of converting rectangular derivatives to cylindrical derivatives and and also cylindrical to spherical.I know the rules but I cant prove EQUATIONS.thx alot
*Thursday, December 1, 2011 at 2:58pm by parsa*

**math**

I studied derivatives before, but kind of forgot them all, is there a website that gives me an overview of derivatives. What is first and second derivatives, how to find it, all the derivative rules and so on... thank you
*Thursday, October 9, 2008 at 12:52am by Sam*

**Derivatives**

Find the derivatives of: 1. H(x)= sin2xcos2x The answer given is 2cos4x. My question is, how in the world did they get that!? Shouldn't the answer at least contain the sin function, either negative or positive seeing as it's the derivative of cos? Also, which rules are ...
*Thursday, October 3, 2013 at 3:52am by Daisy*

**Derivatives (check answer)**

Let y=x^5 - pi^5. Find dy/dx My answer is 5x^4 because pi^5 becomes 0? Am I correct?
*Monday, September 17, 2012 at 4:23pm by Greg*

**calculus**

I am learning derivatives and I despise having to use the definition of the derivative. Please check my answer for this particular one! it is different from the one I get by differentiating. The question: f(x) = 2+x / x^3 my answer: -6x^2-2x^2
*Sunday, April 24, 2011 at 9:58pm by dylan*

**Math-Derivitives **

if f(x)=x^3+5x, then f'(2)= if f(x)=cos(2x), then f'(pi/4) derivatives and anti derivatives please help
*Tuesday, March 23, 2010 at 10:18pm by AdrianV*

**check my work on derivatives**

Can someone check my work? So, I took the derivative of (1-x^2)/((1+x^2)^2) I used the quotient rule ((2x((1+x^2)^2)-2((1+x^2)^2)(2x)(1-x^2))) / ((1+x^2)^4) Then I simplified it (2x+2x^2 - 4x((1+x^2)^2)(1-x^2)) /((1+x^2)^4) Then I simplified by factoring out some numbers 2x(x^...
*Monday, September 30, 2013 at 10:37pm by Sarah*

**AP Calculus**

#2, I would change (x^3-4)/ (x^2) to x - 4x^-2 and the integral of that is (1/2)x^2 + 4x^-1 + c check by differentiating my answer, it is right. #3, you had -cosx, how could you get the 3sinx from that? should have been -3cosx + c #4 if y = secx isn't y' = secxtanx ?? take ...
*Thursday, January 22, 2009 at 8:13pm by Reiny*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*Wednesday, March 7, 2012 at 11:06am by maggie*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*Wednesday, March 7, 2012 at 11:10am by maggie*

**Calc. Checking Answer**

a. correct b.Somehow I get the negative of your result. See http://calc101.com/webMathematica/derivatives.jsp#topdoit
*Wednesday, April 6, 2011 at 5:36pm by bobpursley*

**Calculus: Derivatives**

I'm having trouble understanding what derivatives in calculus (instantaneous speed) is. Can someone please explain it to me, or provide some easy links to learn from? Thanks!
*Sunday, September 9, 2007 at 8:32pm by Joe*

**derivatives**

Applications of derivatives A rectangle has its base on the x axis and its upper two vertices on the parabola y=12 - x^2. What is the largest area the rectangle can have, and what are its dimensions. Support your answer graphically. Thanks. Well, the parabola is symettric ...
*Saturday, November 18, 2006 at 2:16pm by Jen*

**math**

It is important to know rates of change in many fields. Derivatives appear often in physics and engineering. Accurate predictions are made using equations that employ derivatives. They are called differential equations.
*Saturday, August 21, 2010 at 3:29am by drwls*

**Statistics & Numerical Techniques**

Because that is the rule for polynomial derivatives. Add up the derivatives of each term. The derivative of a constant term (like -20 in your case) is zero. The derivative of a*x^n is n*a*x^(n-1)
*Wednesday, September 16, 2009 at 7:33am by drwls*

**Calculus**

Okay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2, which I know can be ...
*Saturday, October 21, 2006 at 4:17pm by Tracy*

**calculus (limits)**

I do know how to take derivatives however the course I'm in hasn't taught them yet (long story) so I can't use derivatives in finding the solution; I have to factor. So perhaps a better question is: how do I factor the above expression in a way that will allow me to find the ...
*Saturday, January 22, 2011 at 2:09pm by John*

**Calculus (Derivatives)**

What is the derivative of the this functon? g(x) = -500/x, x cannot equal 0. I know that in order to fnd the derivative I need to put the function into the equation for evaluating derivatives as limits. lim as h -> 0 (f(x+h) - f(x))/h I did this, but I am having ...
*Tuesday, November 1, 2011 at 2:37pm by Mishaka*

**Calculus - Derivatives**

Check your work above. There is an error in the value on the left side. Fix that before the next step.
*Wednesday, October 3, 2007 at 11:39am by Quidditch*

**Math: Derivatives**

How did you get the answer? I don't quite understand. Thanks
*Sunday, April 8, 2012 at 2:56pm by Nick*

**derivatives**

You should have a list handy for the basic trig function derivatives so if y = (csc x)^7 -cos 4x dy/dx = 7(csc x)^6 ( -csc x)(cotx) + 4sin(4x) etc
*Thursday, October 27, 2011 at 11:57pm by Reiny*

**Maths Calculus Derivatives & Limits **

Oops. Using definition of derivative. Check back later. Lots of messy algebra.
*Tuesday, October 25, 2011 at 9:19am by Steve*

**Calculus**

Find a formula for the derivatives of the function m(x)=1/(x+1) IS the answer -1/(x+h)(x+h+1)
*Saturday, September 13, 2008 at 3:50pm by George*

**Calculus-derivatives**

A is your answer because what you have there is the product rule[F'(x)*G(x)+G'(x)*F(x)].
*Thursday, March 8, 2012 at 3:26am by Anonymous*

**math**

You also can in google type: derivatives online When you see listo of results click on: numberempirecom/derivatives.php and solvemymathcom/online_math_calculator/calculus/derivative_calculator/index.php On this sites you will see your derivation in two different simplify forms
*Wednesday, February 16, 2011 at 8:05pm by Bosnian*

**derivatives**

The derivatives of these trig functions should be right there in your Calculus text. for the second of your questions, I will use y' for the first derivative and y" for the second derivative i.e. y'= dy/dx 1+y=x+xy so y' = 1 + y + xy' y'(1-x) = 1+y y' = (1+y)/(1-x) y" = [(1-x)...
*Wednesday, October 31, 2007 at 10:34pm by Reiny*

**calculus**

If you dont know sec or tan derivatives, change them to 1/cos and sin/cos. I will be happy to check your work.
*Tuesday, October 14, 2008 at 7:21pm by bobpursley*

**check my work on derivatives**

Well, the first line is wrong. Should be ((-2x((1+x^2)^2)-2(1+x^2)(2x)(1-x^2))) / ((1+x^2)^4) Maybe that's all the fix you need. If not, visit wolframalpha.com and enter derivative (1-x^2)/(1+x^2)^2 and it will show the correct answer which you show above. Then hit the step-by...
*Monday, September 30, 2013 at 10:37pm by Steve*

**Calculus First Derivatives**

Use linearization: f(2.5) = f(2)+(2.5-2.0)*f'(2) (approx.) =f(2)+0.5f'(2) I'll let you complete the answer.
*Thursday, May 31, 2012 at 3:20pm by MathMate*

**Calculus**

show that the curves r=asin(è) and r=acos(è) intersect at right angles. can you show that the derivatives for each are the negative reciprocal of each other? That is the key. i need more info..i know how to find the derivative...but how will that prove my question. Do I need ...
*Thursday, April 5, 2007 at 6:02pm by Amy*

**Calc--derivatives**

For Carolina, There is no e^x in the answer. The derivative of log(x) is 1/x. Also, Reiny's answer is right. Mine comes up to 2*x^(log(x)-1)*log(x) which is the same thing.
*Tuesday, October 13, 2009 at 5:45pm by MathMate*

**Calc 2**

a) find the partial derivatives of each, and just plug in 1 for x and 3 for y (values should be close to 0)/ b) in using the difference quotients, take the limit as h approaches infinity of both each derivative, plugging in 0.1 for x and y in each one. It's better that you ...
*Sunday, February 27, 2011 at 11:18pm by Joseph*

**Calculus-derivatives**

Verify these answers~ 1. For what value(s) of x does f(x)=(x^2-16)^5 have a horizontal tangent? a) x=-4,4 b) x=-4,0,4 c) x=0 d) x=0,4 Answer is B, x=-4,0,4 --------------------------------------- 2. What is the derivative of f(x)=(3x^2+7)^3? a) f'(x)=3(3x^2+7)^2 b) f'(x)=18(3x...
*Saturday, February 18, 2012 at 1:33pm by Jake*

**calculus**

a)find the first partial derivatives of f(x y)= x √1+y^2 b)find the first partial derivatives of f(x,y)= e^x ln y at the point (0,e)
*Sunday, March 11, 2012 at 1:00pm by maria*

**calculus - derivatives**

can you please find the first 5 derivatives for: f(x) = (0.5e^x)-(0.5e^-x) f'(x) = ? f''(x) = ? f'''(x) = ? f''''(x) = ? f'''''(x) = ? thanks :) f(x) = (0.5e^x)-(0.5e^-x) f'(x) = 0.5 e^x + 0.5 e^-x f''(x) = 0.5 e^x - 0.5 e^-x f'''(x) = 0.5 e^x + 0.5 e^-x f''''(x) = 0.5 e^x - 0...
*Monday, July 30, 2007 at 6:15pm by COFFEE*

**Calculus grade 12**

a) determine the derivative of y = sin2x b) determine the derivative of y = 2SinxCosx c) shoe that derivatives in parts a) and b) are equal d) explain why derivatives in parts a) and be should be equal.
*Thursday, April 12, 2012 at 12:31am by Julie*

**Maths Derivatives**

thank u so much i realised that i had the correct answer but wasnt sure about the signs
*Tuesday, October 25, 2011 at 8:38am by Yousef*

**AP Calc**

You did just fine and your second derivative is correct, if you meant (6y^2 - 4x^2)/(9y^3) except they took it a bit further. notice your numerator is -4x^2 + 6y^2 from the original 2x^2 - 3y^2 = 4 , then 4x^2 - 6y^2 = 8 , and -4x^2 + 6y^2 = -8 to get their -8/9y^3 If you were...
*Tuesday, November 6, 2012 at 10:31am by Reiny*

**Math-Derivatives. **

Sorry to bother you, can you explain the steps to me, so I can see the work and check my work. I thought i had done it wrong, I started my work and then guessed.
*Wednesday, March 24, 2010 at 10:50pm by Anonymous *

**Calculus**

Find the outside and inside functions of the following to find their derivatives: 1) sqrt(2x+9) 2) cos(cos(x)) 3) tan(x) I already know how to find their derivatives I'm just not exactly sure what parts of the chain rule equation would be considered the outside and inside.
*Tuesday, June 18, 2013 at 2:41pm by Robin*

**Calculus/Derivatives**

In addition, can you walk me through how to get the derivatives for these 2 statements, too? a) y = x^5/3 - 5x^2/3 b) y = (the cubed root of the quantity) [(x^2 - 1)^2] Hi there. I need to find the first derivative of this statement. y=x(x+2)^3 I tried the chain rule, but I ...
*Wednesday, March 14, 2007 at 9:07pm by Amy*

**Calculus**

Find the derivatives of the function k(x)=sqrt(sin(2x))^3 I think I have the answer and was wondering if i had it correct k'(x)=2sin(x)^3+8sin(x)
*Monday, February 11, 2013 at 11:02pm by Joe*

**Calculus-derivatives**

So for number 1 the answer is t=1 -2+2t=0 2t=2 2/2=1
*Wednesday, February 15, 2012 at 5:37pm by Jake*

**Math: Derivatives**

Use the shortcut rules to mentally calculate the derivative of the given function f(x) = −x + (3/x) + 1 After deriving it, I got -1+(0/1)+0= -1 But this answer is wrong, and I don't know why. Thank You
*Sunday, April 8, 2012 at 2:56pm by Nick*

**Calculus**

Find the derivatives of the function f(t)=cosh^2(4t)-sinh^2(4t). Simplify your answer completely.
*Sunday, March 3, 2013 at 12:19am by Mike*

**Calculus(derivatives)**

the answer was 6sec^2x-7sinx but what would it be if you put in (5pi/4) how do u put sec^2 in the caculator
*Thursday, February 24, 2011 at 7:59pm by Daniel*

**Class 12th Application of Derivatives**

Find a point on the parabola y = (x-4)^2, where the tangent is parallel to the chord joining (4,0) and (5,1). Solve this question using Lagrange's theorem. Answer is (9/2,1/4)
*Wednesday, July 6, 2011 at 1:22pm by Akash*

**Derivatives**

Find dy/dx for the function, xy-x-12y-3=0. Is the answer -14,I got this from 1-1-12=0, which solves to -14.
*Wednesday, November 5, 2008 at 12:33pm by George*

**derivatives**

Compute f '(a) algebraically for the given value of a. HINT [See Example 1.] f(x) = −2x + 2; a = −5 f '(a) = 1Your answer is incorrect.
*Thursday, March 3, 2011 at 10:30pm by la*

**math**

the answer to this question can not use derivatives (or shouldn't) because it is in a grade 11 math textbook within a quadratics unit. Anyone else want to give it a go?
*Tuesday, March 24, 2009 at 6:52pm by Anonymous*

**Calculus 2**

I don't understand why you were instructed to use trig substitution for this question, it is straightforward You should recognize certain pattern of derivatives and integrals Notice that the derivative of the denominator is 2x and we have x at the top, so this follows the ...
*Wednesday, October 10, 2012 at 9:08pm by Reiny*

**Calculus First Derivatives**

Correct. The general formula for linearization is f(x+h)=f(x)+hf'(x) (approximately) In general, the smaller the value of h, the more accurate the answer would be.
*Thursday, May 31, 2012 at 3:20pm by MathMate*

**Derivatives**

I got 12 sin (3x-1)^2 cos (3x-1)^2 * (3x-1) as my final answer. Is this in the correct simplified form ?
*Thursday, March 14, 2013 at 11:28am by Mark*

**SCI HW CHECK **

D. Name the joint shown in each picture 1. Elmbow answer - Antecubital fossa. 2. wrist answer - carpal 3. shoulder answer - glenohumeral 4. neck vertebras answer - ????????????????? what is the joint in your neck vertebrae called?????????? can you check to see if im correct
*Sunday, April 22, 2012 at 6:19pm by Laruen *

**Science HW Check **

D. Name the joint shown in each picture 1. Elmbow answer - Antecubital fossa. 2. wrist answer - carpal 3. shoulder answer - glenohumeral 4. neck vertebras answer - ????????????????? what is the joint in your neck vertebrae called?????????? can you check to see if im correct
*Sunday, April 22, 2012 at 9:47pm by Laruen *

**math**

Have you considered a Calculus Text? Even a review/study guide? Schuam's College Outline Series, College Calculus is very good. It is available at Barnes Noble. http://math2.org/math/derivatives.htm
*Thursday, October 9, 2008 at 12:52am by bobpursley*

**Health please check my answer**

Please check my answer thanks What does the abbrevation "AD" represent in a medical report ? My answer is both ears
*Thursday, March 20, 2008 at 5:40pm by Kaleigh-Anne*

**Math >> limits**

The limit is of the form: Lim x--> 0 f(x)/g(x) where f(0) = g(0) = 0. So we can't take the limits for f and g separately and divide them. Rewrite the limit as: Lim x--> 0 [f(x) - 0]/[g(x) - 0] = Lim x--> 0 [f(x)-f(0)]/[g(x)-g(0)] Lim x-->0{[f(x)-f(0)]/x}/{[g(x)-g(0...
*Wednesday, September 5, 2007 at 6:57am by Count Iblis*

**cal**

Finding Partial Derivatives Implicitly. Find dz/dx and dz/dy for 3x^(2)z-x^(2)y^(2)+2z^(3)+3yz-5=0 How would you type this in wolfram alpha calcultor to get the answer? Thanks,
*Saturday, March 15, 2014 at 1:29pm by jay*

**Calculus**

What is wrong with the following reasoning??? f(x) = 2^x f'(x) = x[2^(x-1)] Although n x^(n-1) is the derivative of x^n, you cannot apply similar rules when x is the exponent and the number being raised to a power is a constant. The derivative of b^x, where b is a constant, is...
*Wednesday, June 13, 2007 at 10:40pm by Raj*

**calc again!**

i got answers for this one, but i feel like i did something wrong. f(x)= 2x+1 when x is less than or equal to 2 (1/2)x^2 + k when x is greater than 2 1) what value of k will make f continuous at x = 2? my answer: i got k = 3 because it would make the two parts of the function ...
*Friday, February 20, 2009 at 12:04am by jane*

**Math, derivatives**

You're on the right track. sin 2x= 2sin x cos x (identity) substitute into your first answer. f'(x)=2x-2(sin2x) f'(x)=2(x-sin2x)
*Monday, May 5, 2008 at 8:19pm by Doug*

**Math-Derivatives. **

if y=sec^(3)2x, then dy/dx= my answer is 6 sec^3 2xtan 2x but im not sure if that is right. ? Can someone show me if i did it correct.
*Wednesday, March 24, 2010 at 10:50pm by Anonymous *

**Calculus (Normal Line, please check my work)**

Where did you get infinity? Using differentiation, I found that: dy/dx = (-4cosx) / (9(-siny)) When I put (pi, 0) into this equation, the denominator is 0, making the slope of the tangent line undefined. And since the slope of the normal line is -1/(slope of the tangent line...
*Saturday, December 17, 2011 at 3:51pm by Mishaka*

**math**

solve and check your answer. Please check this for me to see if I have the right answer. __2__ = __3__ 1-x 1+x x= 1/5
*Thursday, April 4, 2013 at 11:41am by Michael*

**8th Grade Algebra-Answer Check**

1. yes 2 yes 3 yes 4 yes You do not need to do a geometric series to check the answer. Just divide with a calculator.
*Monday, January 19, 2009 at 3:03pm by Damon*

**Chemistry**

I thought I did this for you last night. Do you just want to check your answer? Post the answer or your work; I'll be happy to check it for you.
*Friday, February 17, 2012 at 12:20pm by DrBob222*

**Can someone check these answer for me?**

Of course you know you could just do some research on the web and double check your answer by asking it here...
*Thursday, October 17, 2013 at 4:57pm by John *

**Science **

i'll check in my notes AGAIN 2 check to see if i can find the answer the you can check it for me
*Monday, November 7, 2011 at 8:40pm by Laruen *

**ms sue help**

can u check my answer and check my answer on another? 4. _____ is measured in half-lives. *Radioactive decay Absolute age Uniformitarianism Carbon-14 I thinks its a
*Tuesday, November 20, 2012 at 1:16pm by Jman*

**calculus**

Partial derivatives: Zr=3r+h+L(r^2+rh)=0 Zh=2 %pi r + L %pi r^2 = 0 ZL=πr^2h+(2/3)πr^3-1000 =0 Eliminating L from first two equations gives r=h Substitute h=r in third equation gives r=(600/%pi)^(1/3) =5.7588 approx. Check my arithmetic
*Saturday, November 5, 2011 at 6:24pm by MathMate*

**Calculus**

Without specifying the f(x,y,t) function, you can only give a general formula. dz/dt(total) = İz/İx*dx/dt + İz/İy*dy/ dt + İz/İt where all of the z derivatives on the right are partial derivatives. dz/dt(total) = b İz/İx+ c İz/İy + İz/İt I won't know if the İ ...
*Saturday, February 27, 2010 at 2:11pm by drwls*

**Calculus derivatives**

The derivative f'(a) is the sum of the derivative of a and the derivative of sqrt a. In this case, a is treated as a variable, not a constant. The answer is 1 + 1/(sqrt a)
*Monday, October 27, 2008 at 5:27am by drwls*

**derivatives**

[ low*d(high) - high*d(low) ] / (low)^2 where high = numerator low = denominator d(high) and d(low) = respective derivatives first recall that the derivative of csc x = -(cot x)(csc x) therefore, [ x*(-6 (cot x)(csc x)) - 6 (csc x) ]/x^2 or -(6 csc x)*(x(cot x) + 1)/x^2 hope ...
*Friday, October 28, 2011 at 1:29am by Jai*

**CALCULUS DERIVATIVES CONTINUITY**

Let f be the function defined by the piecewise function: f(x) = x^3 for x less than or equal to 0 x for x greater than 0 Which of the following is true? a) f is an odd function b) f is discontinuous at x=0 c) f has a relative maximum d) f'(0) = 0 e) f'(x) > 0 for (x is not ...
*Thursday, May 31, 2012 at 5:11pm by NEED HELP NOW*

**calculus**

Set up the objective function, F(x,y,L) (L stands for lambda) such that F(x,y,L)=xy+L(x^2/8+y^2/2-1) Now calculate and equate to zero the partial derivatives with respect to each of the independent variables, x, y and L. ∂F/∂x = y + xL/4 =0 ∂F/∂y = x + yL =...
*Monday, February 27, 2012 at 7:45pm by MathMate*

**Math 8R: Homework Check - Part 3 **

Part 3 : Evaluate when x = -2, y = 5 21. 4x + 2y, Answer: 2 22. 3(x) *to the 3rd power*, Answer: -221 23. (x + y) *to the 2nd power*, Answer: 9 24. -4x + 2y, Answer: 18 Please check to see if my answers are correct. Thank You!!! :)
*Monday, October 29, 2012 at 2:31pm by Laruen*

**differential calculus**

surely your text has a table of derivatives of trig functions. This is such a basic question, you could have looked up the answer in less time than typing in the question. d/dx (sin x) = cos x Is there more to this than first appears?
*Wednesday, June 26, 2013 at 8:34am by Steve*

**Calculus AB**

http://www.jiskha.com/display.cgi?id=1292545967 list of common derivatives http://www.ecalc.com/math-help/worksheet/calculus-derivatives/
*Thursday, December 16, 2010 at 7:28pm by TutorCat*

**Creative Writing check answer**

Check what answer?
*Sunday, January 12, 2014 at 6:42pm by Ms. Sue*

**Calculus **

1/2[2/(sqrt3)arctan(2(x^2+1/2)/(sqrt3) I distributed the 1/2, but backed it out for my above answer...I don't think I made any errors backing it out. Here is the answer, with the 1/2 distributed. I know this answer is right because I double check it with an online integration ...
*Saturday, January 22, 2011 at 8:11pm by helper*

**Calc 2**

Lim 3x^2 csc^2 can be written x->0 Lim 3x^2/sin^2x x->0 You can get the limit as x->0 using L'Hopital's rule: It is the ratio of the derivatives of numerator and denominator. You have to apply it twice here, since the first derivatives are also 0/0 Lim 3x^2/sin^2x x-&...
*Friday, February 29, 2008 at 12:56am by drwls*

**English please check my answer**

Please check my answer thank you Cardiology is the study of the heart. Which of the following terms describes the foundation upon which the medical word is built that usually relates to the body organ involved ? A. Prefix B. Suffix C. Root D. Combining form My answer is Root (c)
*Wednesday, March 19, 2008 at 9:39pm by Dakotah*

**Calculus (final question I promise)**

After all the help you have received here, you should be able to most of these questions yourself. You should also make the effort to type a ^ before exponents. Show your work and someone will help you. Factor the equations to find the x-axis interecepts. plug in x = 0 to get ...
*Monday, July 28, 2008 at 8:56pm by anonymous*

**calculus derivatives - insufficient parentheses**

There are insufficient parentheses in the question and the answer. Remember that multiplication and division take precedence over addition and subtraction. So it is mandatory to insert parentheses around numerators and denominators.
*Thursday, July 19, 2012 at 3:22pm by MathMate*

**calc**

Consider a function f : {R}^2 \to {R}^2 for which f(4, -4) = (3, 3) and f{D}f(4, -4) = (5 4) (-3 0) <-- this is a 2x2 matrix The linear approximation of f at the point (4, -4) is (written as a row vector) is L(x,y) = (___,___) thanks, I have no idea where to. Since they ...
*Sunday, April 11, 2010 at 10:58pm by John*

**Math..number string**

sorry, this is a well-known formula and is correct. There is no need to "run the the real numbers as a double-check" let's check some of the numbers e.g. term(4) = 57 + (4-1)(2) = 57 + 6 = 63 ...check! term(612) = 57 + (612-1)(2) = 1278 This was you answer, but obviously doesn...
*Saturday, June 13, 2009 at 7:44am by Reiny*

**Calculus - Anti-Derivatives**

Sorry, I missed the \ mark. It is always better to use / for fractions when typing. Without messing with trig identities for cos (x/8), let's just substitute u for x/8. Then your integral becomes Integral of (cos u)^3 = (1- sin^2 u) cos u du , from u = -(pi/6) to (pi/6) Now ...
*Friday, March 14, 2008 at 5:55pm by drwls*

**math**

x^4 -16 = (x^2 +4)(x+2)(x-2) x^3 -8 = (x-2)(x^2 +2x + 4) The x-2 terms cancel (x^4-16)/(x^3-8) = (x^2+4)(x+2)/(x^2+2x+4) -> 8*4/12 = 8/3 as x -> 2 If you are familiar with calculus, you could also take the ratio of derivatives of numerator and denominator, and get the ...
*Tuesday, February 7, 2012 at 6:01am by drwls*

**Math, derivatives**

f(x) = x² + 2Cos²x, find f ' (x) a) 2(x+cos x) b) x - sin x c) 2x + sin x d)2(x - sin2x) I got neither of these answers, since the 2nd part should be chain rule, right? f(x) = x² + 2Cos²x = x² + 2(Cos x)² then f '(x) = (2)(2)(cosx)(-sinx) My answer: f '(x) = 2x - 4cosxsinx If ...
*Monday, May 5, 2008 at 8:19pm by Terry*

**alegbra**

Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please
*Saturday, March 7, 2009 at 12:08am by Elaine*

**alegbra**

Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please
*Saturday, March 7, 2009 at 12:08am by Elaine*

**Calculus**

I recognized the pattern for derivatives by First Principles If f(x) = 2^x, then the derivative by First Principles at the point (2,4) would be Limit (2^x - 2^2)/(x-2) as x ---> 2 which is your starting expression So f(x) = 2^x and a = 2 check: lim (2^x - 4)/(x-2) as x ---&...
*Friday, October 2, 2009 at 11:15am by Reiny*

**Health care please check answer**

Please check my answer thank you :) How are children hospitals paid ? (excluded from Medicare acute care PPS) My answer they are paid based on reasonable costs.
*Thursday, March 6, 2008 at 7:43pm by Lauren*

**Math please check answer**

please check my answer :) The monthly payment of a $100,000 mortgage at a rate of 8 1/2 % for 20 years is 8678.23
*Thursday, January 10, 2008 at 5:51pm by keleb*

**Health care please check answer**

Please check my answer thank you Verifying the accuracy of HCPCS codes is an important function in what ? I think that it is maintence of chargemasters
*Tuesday, March 11, 2008 at 2:49pm by Rebbeckha*

**ALGEBRA PLS HELP**

CAN YOU CHECK IF IM RIGHT? |-2 +5 | ANSWER 7 |5| +4 ANSWER: 9 |-5| +4 ANSWER : 9 |5+2| ANSWER : 7 |3-7| ANSWER : -4
*Sunday, September 11, 2011 at 10:34pm by MATT *

**Math**

Find the derivative of: ln(2x/x+1) the answer is 1/x(x+1) but i can't seem to solve it that far. ln [2x/(x+1)] = ln 2 + ln (x) - ln(x+1) Add the derivatives of each term and you get 1/x - 1/(x+1) = [(x+1) - x]/[x(x+1)] = 1/[x(x+1)]
*Sunday, March 18, 2007 at 5:11pm by Freddy*

**Health please check my answer**

Please check my answer thanks True or Faslse The term used to describe why medical treatment is necessary is procedure I say False
*Tuesday, April 8, 2008 at 5:04pm by Graie*

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