Friday

April 18, 2014

April 18, 2014

Number of results: 27,639

**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*

**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*

**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*

**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*

**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*

**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**

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*

**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*

**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**

show that the curves r=asin() and r=acos() 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*

**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 - Derivatives**

Oh, okay. I got it. Thanks!
*Wednesday, October 3, 2007 at 11:39am by Adam*

**Calculus**

isn't there a way you do it with the derivatives?
*Tuesday, November 13, 2007 at 12:31pm by Joe*

**Calculus**

Compute the derivatives of : f(x)= x^7 + 7^x+ 7^7
*Monday, November 22, 2010 at 6:54pm by JJ*

**Calculus-derivatives**

Determine h'(x) for h(x)= [x/(1-x)]^2
*Monday, February 20, 2012 at 3:23am by Jessi*

**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*

**calculus**

derivatives. f(x)=(1/-7x^12) f'(2)=? f'(-1)=?
*Friday, January 18, 2008 at 6:47pm by mike*

**// calculus - derivatives**

yours is correct
*Saturday, October 24, 2009 at 5:56pm by bobpursley*

**Calculus-derivatives**

Oh crap nvm!
*Wednesday, February 15, 2012 at 5:37pm by Jake*

**CALCULUS DERIVATIVES CONTINUITY**

I agree with e
*Thursday, May 31, 2012 at 5:11pm by Damon*

**calculus**

Find the derivatives of the functions k(x)=(x^3+e^x)^4
*Monday, February 11, 2013 at 9:27pm by Joe*

**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-Derivatives**

what do you mean by something squared?
*Monday, April 12, 2010 at 11:29pm by John*

**calculus**

derivatives: 2. cos teta/ 1+sin^2
*Tuesday, January 4, 2011 at 12:18am by gen*

**calculus**

find the derivatives F(x)=8ln(x^5-2x)
*Wednesday, April 6, 2011 at 3:02pm by melissa*

**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)**

Find the derivative of cos^2(4x)
*Tuesday, November 3, 2009 at 5:41pm by Amanda*

**calculus**

find the derivatives 1. y=sin^3(2x)(cos2x)
*Tuesday, January 4, 2011 at 12:17am by gen*

**calculus**

find the derivatives 1. y=sin^3(2x)(cos2x)
*Tuesday, January 4, 2011 at 12:18am by gen*

**Calculus(derivatives)**

f(x)=7cosx+6tanx, find f'(x)and f'(5pie/4)
*Thursday, February 24, 2011 at 7:59pm by Daniel*

**Calculus (Derivatives)**

I too was able to come to the derivative of 500/x^2
*Tuesday, November 1, 2011 at 2:37pm by Rodney*

**Calculus-derivatives**

Set the derivative equal to zero.
*Wednesday, February 29, 2012 at 12:16am by David*

**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*

**Derivatives ~ Calculus**

If dy/dx = (1 + x)/(xy), x>0, and y=-4 when x=1, then when x=3, y= what?
*Tuesday, June 5, 2012 at 6:27pm by Hannah*

**Calculus**

take derivatives, so the limit is 2/√(4u+1) / 1 = 2/3
*Monday, September 16, 2013 at 1:32pm by Steve*

**calculus**

Find the first and second derivatives of the function. h(x) = sqrt x^2 + 1
*Tuesday, October 14, 2008 at 7:20pm by Vishnu*

**Calculus**

The derivatives are messy. f = 2x/(1+x^2) f' = -2(x^2 - 1)/(1+x^2)^2 f'' = 4x(x^2 - 3)/(1+x^2)^3 f''' = -12(x^4 - 6x^2 + 1)/(1+x^2)^4 ...
*Thursday, February 9, 2012 at 10:06pm by Steve*

**Calculus-derivatives**

f(x) = (x-1)^(2/3)*(x+3) What are the critical numbers? the derivative would be =2/3(x-1)^(-1/3)(x+3) + (x-1)^2/3 What do I do next?
*Wednesday, February 29, 2012 at 12:16am by Melinda*

**calculus-derivatives**

:D I'm so happy! Never thought to factor that out x) thank you!
*Thursday, March 15, 2012 at 1:39am by mary*

**Calculus - Anti-Derivatives**

Oh. Thank you, Damon, and Drwls. That really helped me out.
*Friday, March 14, 2008 at 5:55pm by Sean*

**calculus - (derivatives)**

Find the derivative of the function f by using the rules of differentiation. F(x) = 3 x
*Sunday, September 21, 2008 at 6:07pm by B <3*

**calculus**

derivatives: 3. y= cot^3(2/x) 4. y= csc^5 (1-t+3t^2) 5. y=sec(5x)/tan3x
*Tuesday, January 4, 2011 at 12:20am by gen*

**Calculus-derivatives**

For number one we find the derivative of 3-2t+t^2 wouldn't that be t-2?
*Wednesday, February 15, 2012 at 5:37pm by Jake*

**Calculus First Derivatives**

If f(2) = 2.5 and f'(2) = -2.5, then f(2.5) is approximately... I have no idea how to do this without an equation.
*Thursday, May 31, 2012 at 3:20pm by PLEASE HELP*

**Calculus**

Find all first partial derivatives: f(x,y)=e^(xy)cosx
*Friday, May 31, 2013 at 6:49pm by Elyse*

**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*

**Calculus Derivatives**

what's the equations of both lines through the point (2,3) that are tangent to the parabola y=x^2+x
*Monday, September 22, 2008 at 4:20pm by Lisa*

**Calculus derivatives**

whoops, I forgot the (1/2). Damon also provided the derivation you wanted.
*Monday, October 27, 2008 at 5:27am by drwls*

**calculus-derivatives**

y=cos^3(12theta) find derivative using chain rule
*Tuesday, September 27, 2011 at 10:42am by hailey*

**Calculus (derivatives)**

What about this do you not understand. Take the derivative, evaluate at the designated points.
*Thursday, October 13, 2011 at 8:59pm by bobpursley*

**Calculus (derivatives)**

find an equation of the tangent line to the curve at the indicated point. y = -(x^1/3); (8, -2)
*Thursday, October 13, 2011 at 9:02pm by Nemo*

**Calculus**

Use L'Hopital's rule. Take the ratio of the derivatives of numerator and denominator at s = 0 [-(1/2)/(3-s) -(1/2)/(3+s)]/1 @s=0 = = -1/(3
*Saturday, October 15, 2011 at 6:08pm by drwls*

**Calculus-derivatives**

Yes for both. Growth and decay problems are awful, just letting you know
*Tuesday, March 6, 2012 at 7:09pm by john*

**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 - HELP plz!**

Find all of the first partial derivatives of f(x,y,z)=arctan y/xz
*Sunday, June 2, 2013 at 2:57pm by Sara*

**Calculus**

Find a formula for the derivatives of the function m(x)=1/(x+1) Please help.....Any assistance would be greatly appreciated.
*Friday, September 12, 2008 at 9:31pm by George*

**differential calculus**

use the product rule to find the derivatives of the given function y=(3x^2-8)^2
*Saturday, April 30, 2011 at 9:40pm by ash*

**Calculus (derivatives)**

find the slopes at the indicated points y = 3 + 5x - 3x^3 (0,3), (1/2, 41/8), (2,-11)
*Thursday, October 13, 2011 at 8:59pm by Nemo*

**Calculus (Continuity and Differentiability)**

Your function has two different derivatives at x = 2. I would not call it differentiable there.
*Saturday, November 12, 2011 at 3:43pm by Damon*

**calculus-derivatives**

Oooooh! Thank you two so much :) I'm more confident in regards to my test now, thank you
*Thursday, March 15, 2012 at 3:07pm by mary*

**Derivatives ~ Calculus**

After integrating and solving, I got approximately 4.711393061. Does this seem right?
*Tuesday, June 5, 2012 at 6:27pm by Stewart*

**Calculus**

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

**calculus - (derivatives)**

Is supposed to be a square root sign? If so, rewrite as 3 x^(1/2)and use the usual rule for differentiating x^n.
*Sunday, September 21, 2008 at 6:07pm by drwls*

**Calculus-Derivatives**

How is 6#sin(#x-1)/cos^3(#x-1) the derivative of f(x)= 3sec^2(#x-1)? #= Pi (I coulnd't find the symbol...sorry.)
*Sunday, September 28, 2008 at 10:02pm by Charles*

**Maths Calculus Derivatives & Limits **

Drag out L'Hospital's Rule 1) 1/3 (8+h)^(-2/3) / 1 = 1/3 * 1/4 = 1/12 2) -2sinx/3 = -√3/3
*Tuesday, October 25, 2011 at 9:19am by Steve*

**Calculus (Derivatives)**

Using the product rule, find the derivative of the following function: (x^1/2 cscx sinx).
*Monday, November 7, 2011 at 6:12pm by Mishaka*

**calculus quick question**

g(x)= sqrt(1-4x^2) Can someone help me find the first and second derivatives please!
*Sunday, December 2, 2012 at 12:08pm by dt*

**Calculus (derivatives)**

The tangent is horizontal at the point where the derivative is zero. Solve: dy/dx = 0 when y = x/(x^2+25)
*Tuesday, September 17, 2013 at 5:41pm by Graham*

**Pre-Calculus !!**

Nice one, Reiny. Went right to the heart of the matter of implicit derivatives.
*Tuesday, November 12, 2013 at 11:35pm by Steve*

**Calculus AB (AP)**

Hi, I have a calculus test tomorrow and I understand how to complete all of the problems, but I am unsure behind the reasoning of taking two derivatives. Can someone please explain the following: 1. g(x)=e^(f(x)) g'(x)=e^(f(x))f'(x) 2. f(x)=Integral from 0 to 3x of the square ...
*Wednesday, April 13, 2011 at 2:47am by Jake*

**Calculus - Derivatives**

Ok, now I have to use the derivative and solve for P. So, the equation is: 4 = -200P^-3 I can get it down to: -50 = P^-3 But, I don't know how to get the -3 away from the P.
*Wednesday, October 3, 2007 at 11:39am by Adam*

**Calculus**

NO Wow! I don't think you understand what a derivative is. Please look in your text or classnotes to learn how to do implicit derivatives.
*Wednesday, November 5, 2008 at 12:14pm by Reiny*

**Calculus**

are you having trouble with this? It looks like straightforward use of derivatives to find critical values and concavity. What do you get?
*Saturday, January 5, 2013 at 1:42pm by Steve*

**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*

**calculus**

Use Fundemental Theorem of Calculus part 1 to find the derivatives of the following: (i) F(x)=Integral ( top3, bottom x) e^-t^2 dt (ii) G(theta)=Integral ( top cos theta, bottom sin theta) 1/1-x^2 dx
*Sunday, January 11, 2009 at 4:58pm by extraordinary*

**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*

**Calculus Review for exam grade 12, please help.**

use the derivatives of y=sinx and y=cosx to develop the derivative of y=tanx
*Friday, June 15, 2012 at 3:12pm by Henry*

**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**

If you want the derivative of the equation you have shown, you should look at the product rule for derivatives. Break this into two functions.
*Thursday, October 4, 2007 at 2:35pm by Quidditch*

**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-derivatives**

Not much joy here. You could always factor out the (x-1)^-2/3 to get (x-1)^-2/3 * (x-1 + x/3) = (x-1)^-2/3 * (4x/3 -1) Depending on what comes next, you may want to massage it some.
*Thursday, March 15, 2012 at 1:39am by Steve*

**calculus/derivatives**

I need to find the derivative and can't do them when they are raised to powers? Thank You. m(x)x^5 - 5x^3+7x -4)^10 (4x^9 +19)^23 this on is tuff!
*Wednesday, July 18, 2012 at 12:43pm by cathy*

**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**

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y
*Monday, April 23, 2012 at 1:13pm by Todd*

**Calculus - Urgent!!!**

Ah, thank you so much. Those are very helpful. Yes, anti-derivatives and integrals are in my text, but it is explained in one paragraph. Thanks again!
*Thursday, April 26, 2012 at 5:18pm by In Need Of Help!*

**calculus/derivatives**

Your brackets don't match , also there is no equal sign is it ... m(x) = (x^5 - 5x^3 + 7x - 4)^10 * (4x^9 + 19)^23 ?? (the * means multiplication)
*Wednesday, July 18, 2012 at 12:43pm by Reiny*

**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)**

f'(x) = -7sin x = 6 sec^2 x Plug in 5 pi/4 for x and see what you get for f'(5 pi/4)
*Thursday, February 24, 2011 at 7:59pm by drwls*

**Calculus First Derivatives**

f(2) + 0.5f'(2) = 2.5 + (0.5)(-2.5) = 2.5 - 1.25 = 1.25, right? Thank you so much!
*Thursday, May 31, 2012 at 3:20pm by PLEASE HELP*

**trig**

any calculus text will list the trig functions and their derivatives.
*Thursday, January 19, 2012 at 8:45am by Steve*

**Calculus**

Find the derivatives of the function f(y)= sinh(sinh(7y).
*Tuesday, October 9, 2012 at 9:38pm by Jake*

**Calculus (Derivatives)**

You mean: F(x) = (x^3 4x^2 + 3) / x ? if so, then first divide each term by x F(x) = x^2 - 4x + 3/x F'(x) = 2x - 4 - 3/x^2
*Sunday, September 21, 2008 at 6:50pm by Reiny*

**Calculus derivatives**

f(a) = a + √a (a) Find the derivative of the function using the definition of derivative.
*Monday, October 27, 2008 at 5:27am by Ben*

**calculus**

From Taylor (Maclaurin series if starting at x =0) series f(x)=f(0) + f'(0)(x/1!) + f""(0)x^2/2!).... here f(x) = e^x f(0) = 1 the derivatives of e^x are all e^x which is 1 at x = 0 so e^x = 1 + 1(x/1!) +1(x^2/2! etc
*Monday, May 31, 2010 at 8:19pm by Damon*

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