Wednesday

April 16, 2014

April 16, 2014

Number of results: 214,299

**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*

**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-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*

**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*

**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*

**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: 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*

**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*

**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 (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*

**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*

**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*

**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**

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*

**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**

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*

**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*

**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*

**Math-Derivatives!!!**

-4x^4 x^1/2+(-7/(x^2 x^1/2))
*Thursday, September 9, 2010 at 8:13pm by Janel*

**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*

**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*

**Math-Derivatives. **

good job
*Wednesday, March 24, 2010 at 10:50pm by Reiny*

**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*

**Math: Derivatives**

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

**Math**

Find the derivatives of the function g(t)= cosh^3 t.
*Tuesday, October 9, 2012 at 10:27pm by Joe *

**Math grade 12 **

Derivatives
*Saturday, August 13, 2011 at 9:59am by Atul prakash patil*

**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*

**Econ/Math Derivatives**

Find the derivative of the quotients: y=4X/(X-3)
*Thursday, September 13, 2007 at 4:03pm by Rachel*

**Econ/Math Derivatives**

Use the u/v rule: (vdu - udv)/v^2
*Thursday, September 13, 2007 at 4:03pm by bobpursley*

**Math derivatives**

Both of your answers are correct. Nice job!
*Friday, August 15, 2008 at 12:41am by drwls*

**Math: Derivatives**

The derivative of f(x) is -1-3/x² Don't know how you got -1, or what the question really is.
*Sunday, April 8, 2012 at 2:56pm by MathMate*

**Math - Derivatives**

The original equation is... f(x) = (28x)(ln(sqrt(x)) + 42
*Sunday, January 25, 2009 at 12:57pm by Anonymous*

**Math**

The derivative is 1+ 8/x^3 Just add the derivatives of the two separate terms: x and -4/x^2.
*Sunday, March 21, 2010 at 7:42pm by drwls*

**Math - eh?**

not familiar with the notation fX(x) and fY(y) partial derivatives?
*Tuesday, March 18, 2014 at 3:51pm by Steve*

**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*

**Math - Derivatives/Logrithms**

should be easy once you recall that d/dx a^x = a^x ln(a)
*Friday, November 1, 2013 at 10:12pm by Steve*

**Math - Derivatives**

WOW that actually helps a lot and less confusing to solve! Thanks so much!
*Wednesday, January 28, 2009 at 3:49pm by Anonymous*

**Math: Calc: Implicit Derivatives**

Find dy/dx give the relation (x^2/9)+(y^2/16)=1 Thank you!!
*Thursday, June 14, 2012 at 10:12pm by Joey*

**math**

find the derivatives, dy/dx for the folowing function : y=ln(cos(0.5)+(sin(x^2+3))^1/3)
*Saturday, August 25, 2012 at 9:50am by deel*

**Math - Derivatives**

How would one take the derivative of "f(x)^[g(x)]? Is there a formula I can follow to differentiate functions like that?
*Wednesday, January 28, 2009 at 5:30pm by Anonymous*

**Math**

Oh! I haven't been taught derivatives yet. Thank you for pointing that out. I'm getting ahead of myself here. :)
*Sunday, February 7, 2010 at 10:45pm by Stuck*

**Math(Please help)**

f(x,y)=x^2 e^2x lny (2,1) I need to find the partial derivatives with respect to x and y. I have not idea how to do this especially with the (2,1).
*Friday, April 29, 2011 at 9:42pm by Hannah*

**Math**

By setting x equal to the appropriate values in the binomial expansion ( or one of its derivatives) evaluate the following : sum(k=1 to n) (n,k) k^2
*Saturday, September 8, 2012 at 6:02pm by frustrated*

**Math, derivatives**

Thanks for your reply! That makes much more sense now. I guess I should go and review my identities.
*Monday, May 5, 2008 at 8:19pm by Terry*

**Math - Derivatives**

I find it difficult to take the derivative of something that has a constant base with a variable as an exponent...and simplify it... PLEASE HELP ME! f(x) = e^(x^(-1)) f'(x) = -1(e^(x^(-2))e^(x^(-1)) f'(x) = -e^(x^(-2))e^(x^(-1)) ????? and... f(x) = 3^x f'(x) = 3^x
*Wednesday, January 28, 2009 at 3:49pm by Anonymous*

**math**

ahh sorry that was supposed to be a new question. i need help with both though hahah, so pleaseee help me! i know derivatives but not in these contexts.
*Monday, September 26, 2011 at 3:15pm by terra*

**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*

**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*

**math**

find the derivatives, dy/dx, for the following functions : y=(1+sin^2{2 exp (3x)})^5y please help me to solve this assignment. thank's
*Monday, August 20, 2012 at 8:29am by deel*

**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*

**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*

**math/ calculus**

full work out with explanation of this problem please we're working with derivatives and i dont understand it given h(x)= cotx/x find h'(pi/2)
*Tuesday, December 20, 2011 at 5:08pm by Angie*

**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*

**Math - Limits/Derivatives**

The demand x is the number of items that can be sold at a price of $p. For x = p^3 - 4p + 400, find the rate of change of p with respect to x by differentiating implicitly.
*Monday, October 21, 2013 at 7:54pm by Cal*

**Math**

x/x^3 = 1/x^2 becomes 0 as x-->0 look at derivatives (2x+1)/(5x^4+8x^3+3x^2) -1/(5-8+3) --->oo
*Friday, October 21, 2011 at 10:19am by Damon*

**Math**

equations do not have derivatives; functions do. for tis, use the chain rule: (e^u)' = e^u u' y = e^(-x^2) y' = e^(-x^2) (-2x) = -2x e^(-x^2)
*Sunday, November 4, 2012 at 11:08am by Steve*

**math/derivatives**

If you mean y = √x - 3/x^2? then y' = 1/(2√x) + 6/x^3
*Wednesday, July 18, 2012 at 11:14am by Steve*

**math**

Take the ratio of derivatives as 1 is approached Lim 250 x^249/1 x-> 1 = 250 It's called L'Hopital's rule
*Tuesday, November 6, 2007 at 4:34pm by drwls*

**Math**

a) they are odd but 1/x is undefined at x = 0 b) linear but x is odd and |x| is even c) d/dx (2^x) = 2^x ln 2 so both derivatives keep repeating but sin x is periodic
*Friday, February 14, 2014 at 1:50pm by Damon*

**Math - derivatives of cos and sin fucntions**

a) Find an equation of a line that is tangent to y=2sinx and whose slope is a maximum value. b) Is there more than one solution? Explain.
*Saturday, November 6, 2010 at 2:23pm by Farah*

**Derivatives**

differentiate and simplify y= (e^x - 1) / x^2
*Sunday, March 25, 2012 at 4:37pm by help*

**Math >> limits**

If you do not understand derivatives, then you will have to find the trig equivalent of the multiangle (identies)equivalents, and reduce the fractions.
*Wednesday, September 5, 2007 at 6:57am by bobpursley*

**Math**

Let f(x) = 3(x-1)^3 + 4(x-1)^2 + 2(x-1) -7 (a) Determine f'''(1) without taking any derivatives. Explain your method. (b) Determine the general Taylor polynomial of f aobut c =2 by computing any for each k, using the formula above for f(x).
*Thursday, November 13, 2008 at 10:47pm by Paul*

**MATH**

Let f(x) = 3(x-1)^3 + 4(x-1)^2 + 2(x-1) -7 (a) Determine f'''(1) without taking any derivatives. Explain your method. (b) Determine the general Taylor polynomial of f aobut c =2 by computing any for each k, using the formula above for f(x).
*Friday, November 14, 2008 at 3:14am by PAUL*

**math**

Add the derivatives of each term. Apply the rule that the drivative of a*t^n is n*a*t^(n-1), is a is a constant. 5/sqrt(t) can be written 5*t^(-1/2), so for that one, a = 5 and n = -1/2 This was not a physics question. It is a beginning calculus question
*Thursday, February 11, 2010 at 1:26pm by drwls*

**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*

**Calc--derivatives**

did u get e^(lnx) / x^2 ??
*Tuesday, October 13, 2009 at 5:45pm by Carolina*

**Calculus**

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

**trig derivatives**

-8sinx
*Thursday, October 27, 2011 at 11:21pm by Reiny*

**Calculus-derivatives**

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

**Calculus**

Hi~ Thank you for your help! I was trying to work on a problem about Taylor series, but i don't think im approaching the problem the right way. I have to find the fifth order Taylor polynomial and Taylor series for the function f(x) at x = 0. f(x) = 1/(x+2) I tried to just ...
*Monday, March 7, 2011 at 9:18pm by KIKSY*

**Math: Derivatives**

If f(x)=g(x)+h(x), then linearity gives f'(x)=g'(x)+h'(x) so f(x)=-x + (3/x) + 1 f'(x)= (-x)' + (3/x)' + (1)' =-1 -3/x² + 0 =-1 -3/x² The second term is obtained by the power rule: d(1/x)/dx = -1/x²
*Sunday, April 8, 2012 at 2:56pm by MathMate*

**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*

**calc**

What are the first and second derivatives of y = (1/x^2)-(1/(x-2)^2)?
*Sunday, November 1, 2009 at 8:18pm by Freddy*

**derivatives**

How do you find the derivative of (6 csc x)/x?
*Friday, October 28, 2011 at 1:29am by hannah*

**Calc**

What are the first and second derivatives of y= x^(2/3) * (2.5 - x)
*Sunday, January 8, 2012 at 6:41pm by Anonymous*

**Calc**

what are the first and second derivatives for y= x* (4-x^2)^1/2
*Sunday, January 8, 2012 at 6:42pm by Anonymous*

**calc**

what are the first and second derivatives for y= x* (4-x^2)^1/2
*Sunday, January 8, 2012 at 10:24pm by Anonymous*

**calc**

What are the first and second derivatives of y= x^(2/3) * (2.5 - x)
*Sunday, January 8, 2012 at 10:24pm by Anonymous*

**Calculus-derivatives**

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

**Anti-Derivatives**

Integrate? Meaning?
*Thursday, April 26, 2012 at 3:32pm by I Need Help*

**CALCULUS DERIVATIVES CONTINUITY**

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

**Maths**

Find the derivatives of these: f(x)=√
*Tuesday, November 13, 2012 at 11:18pm by alexis*

**calculus**

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

**derivatives**

yup! sloppiness on my part
*Tuesday, March 18, 2014 at 11:39pm by Reiny*

**Math**

Pretty easy. Use the fact that the product of the first derivatives of linear functions and their perpendiculars respectively are always -1. This is: m'=-1/(1/2)=-2 Since we can choose an arbitrary function with the imposed properties, it suffices to take g(x)=-2*x q.e.d.
*Wednesday, February 10, 2010 at 10:11am by dongo*

**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 *

**Math**

I am having trouble figuring out how to do partial derivatives. I have tried practice problems and have read my textbook but I am still so confused. Could someone please explain how to do this? Thank you.
*Thursday, April 21, 2011 at 9:17pm by Hannah*

**Calc-Derivatives**

correct, your thinking is right on
*Wednesday, November 28, 2007 at 8:38pm by Reiny*

**Calc--derivatives**

find the der of y= x^(lnx) thanks
*Tuesday, October 13, 2009 at 5:45pm by Carolina*

**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*

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