Thursday

September 3, 2015
Number of results: 45,965

**Calculus**

What is the simplest solution to the Brachistochrone problem and the Tautochrone problem involving calculus? (I know that the cycloid is the solution but I need a simple calculus proof as to why this is the case)
*May 27, 2010 by Sam*

**Calculus, bobpursley! **

This has to do with my last Calculus problem. I need help on it..The part I replied to after you answered the question.
*September 21, 2010 by Leanna*

**calculus**

I need help with this calculus problem. H(S)=S/(1+S) If F 1/2, -1/2 & (a+1)? I can't figure out what this mean /?
*May 30, 2011 by Tammy*

**Calculus AP need help!**

Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function. If f(x)= ∫(4,x^3)√(t^2+10) dt then f '(x).
*April 17, 2012 by dania*

**Calculus**

I need to take a college calculus class. Can someone direct me to a site which might help me get a good start? Thanks in advance.
*July 10, 2008 by jules*

**Calculus Please Need Urgent3 :/**

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. F(x)= (s^2)/(1+3s^4)ds from sqrtx to 1 F'(x)=? Thank you so much guys!
*April 19, 2014 by Jay*

**Calculus**

Need an answer to this Calculus Question. I keep getting this type of question wrong. Thanks. Differentiate the Function: y = (3x-1)^2(2-x^4)^2 y =
*April 19, 2010 by Dave *

**Calculus**

So,y(t) = 2.5e^-t cos2t I need to find the derivative, which is y'(t)= -2.5e^-t(2sin 2t +cost 2t) . And now I need to find t when y'(t) = 0 (I know 2.5 e^-t is never zero.) I need to use trigonometry identity to find it ?
*April 9, 2014 by Gordon*

**Calculus**

I need help with these two review calculus problems for my final exam. What is the derivative of a). (5x^2+9x-7)^5 b). Lne^x^3 For a. I got 50x+45(5x^5+9x-7)^4 For b. I got 3x^2 Can you verify please?
*May 21, 2012 by Sam*

**calculus**

Please help. I need ( with details) how to differentiate with the chain rule f(x)=(x^2-6x+23)^3/2. I need to
*April 10, 2011 by ben*

**calculus**

I need help simplifying this problem. f(x)=x^4/5(x-4)^2 f'(x)=x^4/5*2(x-4)+(x-4)^2*4/5x^-1/5 it is suposed to end up as this: 1/5x^-1/5(x-4)[5*x*2+(x-4)*4] but how do i get it to there? I need to see all the steps and how to get them. Thanks
*March 31, 2009 by Riley*

**calculus**

I need to find the critical number of 4x^3-36x^2+96x-64 by factoring. Basically I need to know the zeros.
*November 9, 2009 by Matt*

**Calculus**

I need help with integrals and I need help with the problem. Integral of 4/sqrt(x)dx
*April 11, 2011 by Leanna*

**Calculus - Urgent!!!**

In case this looks familiar, yes, it is a repost. I really need help. Find the anti-derivitive of f(x)= x^3(x-2)^2. Multiple choice gives me the options: A: 1/6 x^6 - 4/5 X^5 + x^4 + C B: 1/6 x^6 - 4/5 X^5 + 1/4 x^4 + C C: x^6 - X^5 + x^4 + C D: x^5 - 4x^4 + 4x^3 + C I got as ...
*April 26, 2012 by In Need Of Help!*

**Calculus**

Sorry, I need more help! I am reallly struggling with Euler's method, and here's a problem I need help on: y'=2y + sin(x), y(0)=0, dx=0.1, the interval is 0 to 1, and f(x)= [e^(2x)-2sin(x)-cos(x)]/5
*December 18, 2006 by Raine*

**Calculus**

Hi there, I need help with composition of functions. I need to find fog, gof, gog, and fof and their domains for the following: f(x) = square root of 2x +3 g(x) = x^2 + 1 if someone can help me asap that would be so great!
*January 21, 2009 by Lola*

**calculus**

i need to find the derivative using chain rule and show steps: y= (x) / ((x^2)-1)^(-1/2) and is it possible to have free tutoring online like through a chatroom? i am in need of help
*January 10, 2014 by eric*

**calculus**

Need help with the following proof: prove that if lim x->c 1/f(x)= 0 then lim x->c f(x) does not exist.I think i need to use the delta epsilon definition i am not sure how to set it up.
*July 26, 2009 by jeff*

**CALCULUS!!! tangent lines**

If f(2)=4 and f'(2)=3, use the line tangent to the graph of f at x=2 to find a linear approximation for f(1.992) HELP! The only one I need, I need a Genius!!!!
*March 23, 2010 by Anonymous *

**Pre-Calculus**

convert to the alternate form to exponential form. a) 5^4=625 b) e^x=y c) log.001=x I really need help on these problems i have no idea how to do it? pls help me i need to study for it on my exam.
*December 6, 2013 by Lane*

**Calculus**

A curve is defined by the parametric equations: x = t2 – t and y = t3 – 3t Find the coordinates of the point(s) on the curve for which the normal to the curve is parallel to the y-axis. You must use calculus and clearly show your working, including any derivatives you need to ...
*July 18, 2014 by Daksh*

**calculus**

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...
*May 22, 2011 by Claire*

**Pre-Calculus/Calculus**

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I think I know how the ...
*July 1, 2008 by Molly*

**Calculus Graph help!!!**

I need help with a calulus graph and figuring out its equation but it wont let me post the picture of the graphs here. so will someone who understands Calculus and their graphs super well please email me k m k underscore horse lover at hot mail dot com. no spaces and an actual...
*May 2, 2012 by kelsey*

**integral calculus **

(x^4+6x^3-x^2+2)dx need help
*March 29, 2015 by Olya*

**calculus?**

Hello can u help? I need a solution to calculus problem I have $500.00 to spend on fencing for a garden. The fence for the street side costs $30.00 per foot and the other three sides cost $10.00 per foot. what dimensions will give you a rectangle for the largest possible area...
*July 14, 2012 by GiGi*

**Finite Math**

Fifty percent of students enrolled in calculus class have previously taken pre-calculus. Thirty percent of these students received an A for the calculus class, whereas twenty percent of the other students received an A for calculus. Find the probability that a student selected...
*June 10, 2015 by Nikole*

**Calculus**

need answer to find dy/dx y=e^2x+3*e^x-1
*March 14, 2010 by Anonymous*

**calculus**

Need help for calcul: ( 1/2 ( -1 + i√3 )) ^2 thanks for your help
*January 14, 2012 by Sébastien*

**Calculus AP need help!**

antiderivative. find f. f'(x)= 3x^(-2), f(1)=f(-1)=0
*March 24, 2012 by MILY*

**Calculus AP need help!**

antiderivative. find f. f'(x)= 3x^(-2), f(1)=f(-1)=0
*March 25, 2012 by MILY*

**Calculus**

I need to integrate ((e^-x)^2 - (-ex)^2)dx Can someone help?
*May 6, 2012 by Kira*

**Maths (Calculus)**

A current i = 50sin 100πt mA flows in an electrical circuit. Determine, using integral calculus, its a) Mean Value b) RMS Value each correct to 2 decimal places over the range t = 0 to t = 10 ms I need to do this two way so I was thinking of using the trapezoidal rule and...
*May 5, 2013 by Dylan James*

**Pre-Calculus**

How do I solve these equations? I need to create an equation given the characteristics? I have to be able to graph a parabola but first I need help solving this. 1.Focus (1.5,1); opens right; directrix x=0.5 2.Focus (1,4);opens down; contains (-3,1)
*August 19, 2015 by Stephanie*

**Integral Calculus**

A jeepney's velocity over time in ft/sec as it moves along the x-axis is governed by the function v(t)=3t^2-10t+15. If the jeep's position at t= 1 second is 8ft, what is the total displacement made by the jeepney from t=0 to t=5sec? please I need help, i just need the idea on ...
*January 12, 2014 by Lisa*

**Calculus**

I need help finding the vertical asymptote of f(x)= 1-x -------- 2x^2-5x-3
*September 1, 2008 by Marie*

**Calculus**

Need the answer to find dy/dx y=(1+cos^4(t/12))^3
*March 14, 2010 by Anonymous*

**Calculus**

Need help with this complex number equation. 8-3i/-4-6i=
*July 30, 2011 by Josh *

**integral calculus**

ʃ (e^x – 4e^-x/e^x) dx need help...thnks
*January 16, 2012 by int*

**integral calculus**

ʃ (e^x – 4e^-x/e^x) dx need help...thnks
*January 16, 2012 by int*

**math-calculus**

|2x-3|-|2x+5| = 0 i please need helps with this.
*January 18, 2012 by Shreya*

**math-calculus**

|2x-3|-|2x+5| = 0 i please need helps with this.
*January 18, 2012 by Shreya*

**Calculus grade 12**

hi i need help differentiating these.. 1. y = cos(3x^2 + 2x) 2. y = ln(3x^2 + 5) thank you
*June 21, 2012 by Albert*

**Calculus**

I need help finding the derivative of √3x/(x^2-4) at x=3
*February 17, 2014 by Annie*

**Calculus**

Hi! I need help finding the derivative of this function. f(x)= ln [(x(x-1))/(x-2)] Thank you.
*September 30, 2014 by Darren*

**Calculus **

Find ¡Ò[dx/(x-2)(x+3)(x-4)] this is really confusing and I need help with it.
*January 28, 2015 by Francis *

**Calculus**

What is the use of Calculus? How is it use in jobs? What jobs use Calculus? Calculus is used in engineering, economics, any physical science, and in business (e.g., actuary studies and statistics).
*May 5, 2007 by Anonymous*

**calculus**

f(x)=(y+a)and b=the limit as y aproches 2+f=1000. I need to know what y and a equal.
*November 28, 2007 by Roseliandystarajestarahjaesracritreah*

**Business Calculus**

I need help with: r(x)= 4/5x^2 + 8x + 15 What do you do with the 4/5X^2? I know that (x+3) and (x+5) is the factoring for x^2 + 8X + 15 but have no clue what to do with the 4/5.
*September 12, 2010 by Mary*

**calculus **

i need a real life application on parabola.
*May 16, 2011 by Reem*

**calculus**

Need help asap! what is the limit as x approaches 0 of -x/tan(3x) ?
*September 19, 2011 by miley*

**calculus**

Hi i need help for calcul with a Moivre's theorem: ( 1/2 ( -1 - i√3 )) ^3 thanks for your help
*January 24, 2012 by Sébastien*

**calculus**

I need help finding the derivative of (x^2+sinx)secx
*February 21, 2012 by jholm*

**pre-calculus**

I need help with soving this problem. G(u) =4-3u-u^2; Find G(-2u)
*February 17, 2013 by Jackie*

**calculus**

Given g(x) = (x + cosx)/(e^x - 2x^3 + 5). Find g'(x). Do not need to simplify.
*October 17, 2014 by RAJ*

**college pre-calculus help**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!!
*January 11, 2015 by Derek*

**Calculus: need clarification to where the #'s go**

A particle is moving along the curve y= 2 \sqrt{4 x + 4}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 5 units per second. Find the rate of change of the distance from the particle to the origin at this instant. *I just need step by ...
*October 27, 2014 by Alessandra*

**Calculus**

dP/dt = k(P-a) dP/dt = kP-ka dP/P = k-ka is this right so far? was i supposed to distribute??? what do i need to do next???
*December 7, 2008 by Hannah*

**calculus i need help please**

evaluate: integration of x^2 (square root of (1-2x^3))dx
*February 19, 2009 by joel*

**Calculus, need help again...**

If the function f is defined by f(x)=x^2-2x, find limit h->0 (f(3+h)-(f(3-h))/2h
*September 21, 2010 by Leanna*

**Calculus**

i need help finding area under curve of:2y=sqrt(3x),y=4, and 2y+1x=4
*March 5, 2011 by applebottom*

**Calculus**

Take the derivative of the following functions. You do NOT need to simplify. h(x)=(6x^3+2x)/(x^2-3x+5)= F(x)=(5x^2+1)(3x-2) =
*October 2, 2011 by Allison*

**Calculus**

f(x)= 6ln(2x+7ln(x)) I need to find the first derivative.
*October 28, 2011 by DJ*

**Calculus**

Find the antiderivative of (sqrt(x)+3/x-2e^(x))dx. Need steps so I can follow. Thanks
*April 16, 2013 by Rene*

**calculus**

i need help with proving five steps of l hospitals rule for (ex^2-1)/x
*October 30, 2013 by carolyn*

**calculus**

Please i need help with this. Find the area bounded by the curves y0…5 - 4x = 0, 2x - y - 4 = 0
*January 27, 2015 by Jazmine*

**AP Calculus BC Resources**

Hi there, I was hoping if any one was familiar with any sites that have printable integration/differentiation packets? I'm hoping to use them for everyday practice. I skipped Calculus AB and need a little help. I love packets so if there are any out there (hopefully with ...
*October 26, 2006 by Ted*

**Calculus**

f(x)=[sqrt((x-68)^2 + x^3-116x^2-417x+267460)] - 10 To find the minimum value of we need to check the value at the following three points (in increasing order). (You will need to use a numerical method, like Newton-Raphson to find one of these points.) x1=? x2=? x3=?
*November 22, 2009 by Salman*

**Calculus**

Hi there I am having some troubles trying to do my calculus homework and I really need help trying to do this problem from my homework: Set up the problem and do not solve: The mass of the solid bounded by the surfaces 2x^2 + 2y^2= 9, z=0, z=3 with density function p(x,y)= x^...
*December 3, 2009 by shylo*

**calculus**

f(x)=12x/sinx+cosx find f'(-pie) anyone know the answer!!! need help!
*February 24, 2011 by Daniel*

**calculus**

2x^3+3x^2-12x-7 the absolute maximum. I need help because it seems no one else in my class knows how to.
*June 28, 2011 by josh*

**calculus**

sqrt(x^2 - 9) / x I need to solve this using the definition of a derivative [f(a+h) - f(a)]/h I can't seem to get it :\
*October 1, 2011 by Daniel*

**Pre-Calculus**

Need help with the following along with all steps. Find y" for y = 3x + 4/x
*November 19, 2011 by Stacy*

**integral Calculus**

ʃ(1-sin A)^2 cos A dA please help.i don't know how to solve this.i need your help
*December 7, 2011 by WAN*

**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!
*July 18, 2012 by cathy*

**Pre-Calculus**

I need help sketching the graph of a piecewise function. f(x) = { x² if |x|≤1, -x² if |x|>1
*August 19, 2012 by Peter*

**Calculus AP**

im still stuck. i need help. evaluate the integral ∫sinx /(1+x^2) dx from -1 to 1
*August 26, 2012 by Vicky*

**Calculus**

Find the anti derivative of (u^-2(1-u^2+u^4)du. Need steps so I can try to grasp this. Thanks
*April 16, 2013 by Rene*

**college pre-calculus**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!! answers: A. -y B. y C. -6/y D. -1/y which one?
*January 11, 2015 by Derek*

**Calculus**

A fully plane has a constant acceleration while moving down a runaway. the plane requires .7 mile of runaway and a speed of 160 miles per hour in order to lift off. what is the planes accelearation? i need the formula cause the one i have doesnt work cause i need time
*December 8, 2009 by Nancy*

**Calculus Need of Urgent help**

find the indicated limits, if they exist. 1. lim (3x^3+x^2+1)/(x^3+1) x-> -infinity 2. find the slope of the tangent line to the graph of the given function at any point: f(x) = 2x +7 Could anyone please, please, please explain to me how to do these problems? It seems like ...
*February 8, 2011 by Anonymous*

**MATH!! Calculus inverses**

if g(x) is the inverse of f(X), g(x)=f^-1(x) such that g(3)=5 and f'(5)=4 what is the value of g'(3)??? HELP i just need this one.
*March 23, 2010 by Dulce :)*

**Math (Calculus AB)**

An equation to the graph of y=x^3+3x^2+2 at its point of inflection is: a) y=-3x+1 b)y=-3x-7 c)y=x+5 d)y=3x+1 e)y=3x+7 Please help. I am in urgent need.
*January 24, 2011 by Jake*

**MATH(CALCULUS)**

f(x)=12x/(sinx+cosx) find f'(-pie) need some help!
*February 25, 2011 by Daniel*

**Calculus**

I need help finding the derivative of this function: f(x)=(X^2+2)^4/5 Thanks in advance! Any help would be greatly appreciated!
*November 20, 2011 by Confused*

**pre calculus**

Find the domain of the function h(x) = (x/ x-1) I need to know how to solve this, not just the answer! Help!
*December 13, 2011 by amy*

**pre calculus**

Write the expression below as a single logarithm. Need to know how to work this! ln(x-5/x^2 - 1) - ln (x^2 - 2x -15/x + 1)
*December 17, 2011 by James*

**Calculus AP need help!**

i still understand this problem If x^2/25 +y^2/49=1 and y(3)=5.6000, find y'(3) by implicit differentiation.
*February 28, 2012 by josephine*

**Calculus**

dy/dx = 4xy^2 I need to find the integral of that. So I separate the variables and have 1/y^2 dy = 4x dx. Where do I go from here?
*March 2, 2012 by Jasmine*

**Calculus**

I need help solving for this final problem to complete my assigment. Please help! Solve for x: ln(x^4)-ln(x^2)=2
*September 24, 2012 by arcos15*

**Pre calculus **

Verify Sinx-sinxcos^2x =sin^3x Need every step!!!
*February 10, 2013 by Kristen *

**calculus**

What is the limit, as x approaches 1, of (sqrt(x) - 1)/(x - 1)? I need to show work, but I know the answer is 3/2, because I confirmed with a TI-89.
*March 15, 2015 by John*

**physics/calculus**

I need help in calculating work. following quantites are given. * G: 6.67E-11 *Mass of earth:5.98E24 *mass of satelightt:80kg *x(initial) center of the earth-7E6 m *x(final) center of the earth 12E6 m How do I make integral equation I need use 20 interval.
*April 7, 2014 by jenny*

**Calculus**

Hello, I really need help on these two homework problem. >< In problem #1, I believe it is related to the exponential functions and their derivatives section...in Calculus II? So, surely there should be a ln in the solution as well? I would like a step by step process ...
*January 31, 2015 by Aria*

**Calculus**

Find the derivative of y=x^2 / e^2x using the Quotient Rule, and simplify. I really need help! please! :)
*November 30, 2008 by Mel <3*

**Calculus**

I need to find the next 3 terms...but I can't figure out what the rule for this! 3, 5, 3 1/2, 4 1/2, 3 3/4, 4 1/4, 3 7/8, 4 1/8... please help! thank you so much
*September 12, 2009 by Farhin*

**calculus**

I need to find the dy/dx of x^2ln(x^2)I tried to do it the way I thought, but it did not come out right.
*June 28, 2011 by Ronald*

**Calculus AP need help!**

its difficulty problem. find dy/dx by implicit differentiation 1.4 cos x sin y = 1 2.tan(x/y)= x+y
*February 29, 2012 by stacey*

**BC Calculus**

Use linear approximation to estimate sec^2(pi/4 + .025) Need help quickly please!! :)
*October 24, 2012 by Jake*

**calculus**

it says lim as x>-3 x+3/ x^2+7x+12 I need to find the limity using subsitution, a table, or by graphing...
*December 17, 2012 by sam*