Thursday

April 24, 2014

April 24, 2014

Number of results: 8,156

**Maths - Integration by parts**

Integral x^2 sin(x) dx
*Wednesday, November 7, 2012 at 11:58am by Anonymous*

**Maths -Integration by parts**

Intergral square root of x sin(x) dx
*Wednesday, November 7, 2012 at 11:57am by Anonymous*

**Maths - Integration by parts**

Use the partial ractions to find The integral (3x^2-x+2)/(x-1)(x^2+1) dx
*Wednesday, December 12, 2012 at 10:53am by Anonymous*

**Calculus - Integration by Parts**

Please help me solve this integration problem. I don't understand how to do it. Thank you! ∫e^(2x)*sin(2x)dx
*Wednesday, May 18, 2011 at 2:14am by Emma*

**Math - Indefinite Integration**

Use integration by parts to solve: I = f (x^3)(e^(x^2)) dx (Let "f" represent the integral) Let u = (e^(x^2)), dx = (1) / (2x(e^(x^2))) du Let dv = x^3, v = (x^4) / (4) I = (1/4)(x^4)(e^(x^2)) - (1/4) f (x^3) (2(e^(x^2))) du ... and now I don't know what to do. I don't know ...
*Monday, February 9, 2009 at 6:00pm by Anonymous*

**calc**

evaluate the integral: y lny dy i know it's integration by parts but i get confused once you have to do it the second time Leibnitz rule (a.k.a. product rule): d(fg) = f dg + g df y lny dy = d[y^2/2 ln(y)] - y/2 dy ----> Integral of y lny dy = y^2/2 ln(y) - y^2/4 + const. ...
*Wednesday, May 23, 2007 at 5:29pm by marsha*

**integration**

sqrt2 times e^t times t^(1/2) dt bounded between 0 and 1. i tried integration by parts.. but it keeps repeating.. please help. thank you!
*Thursday, August 27, 2009 at 5:29am by tiff*

**math**

integration by parts - Integration of x^2 ln(x^3+2)
*Wednesday, February 23, 2011 at 4:05pm by zooey*

**Maths-Integration by Partial Fraction**

Use integration by partial fractions to find Integral (3x^2-x+2)/(x-1)(x^2+1) dx
*Wednesday, December 12, 2012 at 6:15pm by Anonymous*

**integration by parts**

s- integral s ln (2x+1)dx ? = ln(2x+1)x - s x d( ln (2x+1)) = ln(2x+1)x- s x [(2x+1)'/ (2x+1)] dx = ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused... "ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused..." x [(2)/ (2x+1)] = 2x/(2x+1) = (2x+1-1)/(2x+1) = 1-1/(2x+1) B.t.w...
*Saturday, February 17, 2007 at 1:05pm by nicholas*

**Integration**

1. [integration] (3x+7sin(x))^2 dx i tried 3 different methods of integration but all of my answers are wrong. 2. [Integration]from 0 to 5 (3w-3)/(w+6)dw i divided the numerator by the denominator and then tried to solve the question but im getting the wrong answer.
*Tuesday, November 2, 2010 at 11:10pm by AY*

**Maths - Integration by Parts**

Question 1 ç e^2x Cos(4x) dx Question 2) ç ãx sin(x) dx Question 3) ç x^2 sin(x) dx
*Wednesday, November 7, 2012 at 10:15am by Anonymous*

**Integration by parts**

integrate (e^x-x)^2 dx
*Wednesday, July 13, 2011 at 9:55am by Steff*

**calculus**

How do you find: the Integral of arcsin(1 / (sqrt x^2 - 1) ) dx ?? (The integral of arcsin of one over the squareroot of x squared minus 1) So far, I've used trig integration to simplify down to arcsin(1/tanb) *secbtanb b is theta Then, I've used integration by parts. But i'm ...
*Monday, October 13, 2008 at 6:38am by Cindy*

**calculus**

The antiderivative of arctan(4t)dt by integration of parts.
*Monday, February 28, 2011 at 10:21pm by Kate*

**Calculus B**

The antiderivative of ln(2x+1) using integration by parts.
*Monday, February 28, 2011 at 10:18pm by Brandon*

**calculus **

reverse the order of integration integration 1-e integration 0-lnx dy dx
*Thursday, January 12, 2012 at 3:32pm by ali*

**Calculus 2**

integral of xarctanxdx using integration by parts.
*Wednesday, September 26, 2012 at 3:19pm by Heather*

**calculus**

INTEGRATION BY PARTS... 1) e^5t sin 3t dt 2) xe^3x dx 3) x sec^2 x dx **anybody can help me for this question?
*Tuesday, December 4, 2012 at 12:09am by kchik*

**calculus**

Use integration by parts to find ∫ 2x e-x dx.
*Monday, March 11, 2013 at 3:02pm by mikey2*

**CALCULUS**

USE INTEGRATION BY PARTS TO FIND EACH INTEGRAL ƪxe^2x dx
*Wednesday, July 6, 2011 at 3:26pm by renee*

**Cal**

USE INTEGRATION BY PARTS TO FIND EACH INTEGRAL ƪxe^2x dx
*Wednesday, July 6, 2011 at 7:36pm by renee*

**Calculus**

Use integration by parts to evaluate the integral xsqrt(2x+6)dx.
*Thursday, September 26, 2013 at 12:45pm by Taylor*

**CALCULUS**

USE INTEGRATION BY PARTS TO FIND EACH INTEGRAL ƪx^5 Lnx dx
*Wednesday, July 6, 2011 at 3:28pm by renee*

**calculus**

USE INTEGRATION BY PARTS TO FIND EACH INTEGRAL ƪãx lnx dx
*Wednesday, July 6, 2011 at 3:29pm by renee*

**brief calc**

evaluate the integral using integration by parts 7xe^-x
*Tuesday, November 19, 2013 at 12:03am by kyle*

**calculus-integration**

integrate -2/xln^4(x)...plz help me..give me an idea on how to start..plz The derivative of the ln(x) function is 1/x and this is multiplying the ln^4(x). You can thus write the integral as: -2 * 1/5 ln^5(x) + constant. is that the answer? wut about the x infront of ln^(x)......
*Monday, May 7, 2007 at 1:03pm by Maria*

**Calculus**

How do I go about integrating sin[x^(1/3)]dx?? I tried doing integration by parts and I'm going in circles.
*Friday, February 13, 2009 at 12:23am by Hannah*

**Calculus**

Use either substitution or integration by parts to evaluate the integral: ∫(x+2)/(x²+2) dx Thank you!!
*Tuesday, October 18, 2011 at 9:08pm by Erica*

**Calculus**

How do I integrate (x^2)(e^(x^3)) dx? I think it is integration by parts but after trying that, I got confused?
*Wednesday, December 14, 2011 at 9:08pm by Anonymous*

**Maths**

what is the integration of dx/Cos^4(x)
*Wednesday, September 7, 2011 at 10:00am by Deepak*

**maths**

Split 597 into three parts such that these are in A.P. and the product of the two smallest parts is 796.
*Friday, September 20, 2013 at 2:01pm by partha*

**cal**

USE INTEGRATION BY PARTS TO FIND EACH INTEGRAL ƪsquare rootx lnx dx
*Wednesday, July 6, 2011 at 7:37pm by renee*

**Calculus II**

the gamma function r(x) is defined by r(x)= integral from 0 to infinity of x^n-1(e^-1)dx where n>0. Use integration by parts to show that r(n+1)=nr(n).
*Monday, April 7, 2014 at 5:03pm by chelsea *

**maths**

use an iterated integral to find area of region bounded by graphs sin(x) and cos(x) between x=pi/4 and x=5*pi/4 but using HORIZONTAL strips.(i.e dxdy is order of integration for the double integral). it has been suggested by a textbook that this is a formidable task. easy ...
*Friday, August 13, 2010 at 8:00am by arron hamilton*

**Competetion help on Integration**

If there four options are given to a Defenite Integration then what shortcut trick we should choose to get the correct answer. Like in Indefinte Integration we find the differtation of the answer to reach the function given to integrate. You can try to eliminate some answers ...
*Monday, February 12, 2007 at 10:22am by Nitin*

**Calculus**

How do I evaluate this integral: x^9cos(x^5)dx Hint: First make a substitution and then use integration by parts.
*Sunday, February 22, 2009 at 9:37pm by J*

**Math Integration**

i keep getting stuck and i think im missing something integrate by parts e^(bx) cos x dx thanks
*Friday, November 20, 2009 at 2:04pm by Amelia*

**calculus**

How do I integrate x(arctanx) dx? Is it some sort of integration by parts? Can you please show steps? Thanks in advance!
*Thursday, December 15, 2011 at 12:02am by W*

**Maths- Integration by partial fractions**

Integral (3x^2-x+2)/(x-1)(x^2+1) dx
*Wednesday, December 12, 2012 at 6:10pm by Anonymous*

**culteral Diversity**

In Milton Gorton's theory of assimilation, the crucial step is from a. Integration to acculteration b. Acculteration to integration c. Assimilation to plurism d. Anglo-conformity to the melting pot e. Integration to intermarriage
*Saturday, December 19, 2009 at 8:57am by Andrea*

**calculus**

how to take the integral of cos(square root of x) dx. need to use substitution and integration by parts but I don't know what to substitute
*Monday, January 21, 2008 at 7:49pm by sarah*

**Calculus**

Use integration by parts to find the given integral: ∫_9^1 (7t - 42)e^(7 - t) = [-28(1 + e^8)] / e^2 Is my answer correct? or... is it.. = -70e^(-2) + 14e^6
*Tuesday, March 3, 2009 at 7:36pm by Anonymous*

**calculus**

The following definite integral can be evaluated by subtracting F(B) - F(A), where F(B) and F(A) are found from substituting the limits of integration. \int_{0}^{4} \frac{1600 x +1200 }{(2 x^2 +3 x +1)^5}dx After substitution, the upper limit of integration (B) is : and the ...
*Saturday, March 8, 2014 at 6:00pm by ricky*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4)^ln x dx between 3 and 0
*Wednesday, November 23, 2011 at 11:56am by Jane*

**maths**

integration of upperlimit 1and lower limit -1 the function 2x+3/(x^3=3x +4)dx
*Wednesday, March 13, 2013 at 12:10pm by Anonymous*

**chemistry**

The urine of horses are mixed with an excess of hydrochloric acid, after some time, a yellowish-brown crystalline precipitate, which have an unpleasant odor, that can't be removed by simply washing with water. This new compound has the following composition (parts by mass): ...
*Wednesday, September 11, 2013 at 3:41am by Ad*

**calculus**

Use integration by parts to evaluate the definite integral. Intergral: xsec^2(6x) dx I set u=sec^2(6x) and dv=x, but the problems seems to get harder as I go on.
*Friday, February 27, 2009 at 8:18pm by Jake*

**Maths - Integration**

Find the exact value of the intergal with limits 1 and 0 respectively for the x^2 e^2x dx.
*Wednesday, December 12, 2012 at 10:48am by Anonymous*

**Calculus**

I need help solving the integral of t * e^-3t dt I know that I have to solve using integration by parts and so I've let u=t to rid of dt and dv=e^-3t which I believe would yield -(1/3) * e^-3t as v. Am I doing this correctly? Thanks. I appreciate the help. (:
*Thursday, February 7, 2013 at 4:56pm by Anonymous*

**integration by parts**

s- integral s ln (2x+1)dx ? = ln(2x+1)x - s x d( ln (2x+1)) = ln(2x+1)x- s x [(2x+1)'/ (2x+1)] dx = ln(2x+1)x- s x [(2)/ (2x+1)] dx = ln(2x+1)x- s (2x/2x+1) dx = ln(2x+1)x- s [(2x+1-1)/(2x+1)] ... i'm confused about why there is a minus 1 after the integral
*Saturday, February 17, 2007 at 9:01pm by nicholas*

**math**

Use integration by parts to verify |(from -pi to +pi)cosmxcosnxdx = pi when m=n and |(from -pi to +pi)cosmxcosnxdx = 0 when m and n are not equal.
*Wednesday, March 2, 2011 at 9:16am by chris*

**Calculus II**

Evaluate the integral using method of integration by parts: (integral sign)(e^(2x))sin(5x)dx
*Sunday, February 22, 2009 at 6:06pm by Kurai*

**Calculus B**

The Antiderivative of: x(arctanx)dx It's clearly integration by parts with u=arctanx and dv=x, but after that I go down hill. HELP!
*Monday, March 28, 2011 at 8:25pm by Brandon *

**Quick Calc Question**

I can't remember how to integrate ye^ey with respect to y. Is it (y^2)e^xy? or do i need to do integration by parts? i just cant remember.
*Sunday, November 4, 2007 at 4:18pm by Michael*

**antiderivative**

i need help with finding anti derivative of -2xe^x +y-6x^2 dx so i use the integration by parts to solve for -2xe^x?
*Wednesday, October 8, 2008 at 3:08pm by allison*

**Calc**

Use integration by parts to evaluate the integral. ∫ from 1 to 4 of (√x) (ln√x) dx Im not really sure what to choose for u and dv. Thank you so much for the help!!
*Tuesday, October 18, 2011 at 8:45pm by Erica*

**Stats: Joint Density Function**

Let the joint density function of X and Ybe given by: f(x)={kxy^2 for 0<x<y<1 (0 otherwise what is the value of k? Can someone please help me with this? The formula I used was: ))kxy^2 dx dy (where )) is double integration both from 0 to 1). I worked it out (I think) ...
*Wednesday, October 18, 2006 at 7:25pm by Stephanie*

**3rd grade**

alice folded a piece of paper into 12 equal squares and colored them. She had 3 times as many red parts as green parts and 2 more yellow parts than blue parts. How many parts did she have of eeach color?
*Tuesday, January 20, 2009 at 5:33pm by tee*

**Calculus**

First make a substitution and then use integration by parts to evaluate. The integral of (x^9)(cos(x^5))dx What do you substitute first? I do not understand what they are asking for. Please help. thanks!
*Thursday, November 11, 2010 at 11:11pm by Adam*

**Calculus**

First make a substitution and then use integration by parts to evaluate. The integral of (x^9)(cos(x^5))dx What do you substitute first? I do not understand what they are asking for. Please help. thanks!
*Tuesday, November 16, 2010 at 2:43am by Adam*

**Maths**

Integration By substitution ive been given this equation int x^2(x^3-6)^3 dx using u = x^3 -6 but i dont understand how to do it please help
*Sunday, November 15, 2009 at 10:25am by Amelia*

**maths**

Integration by substitution ive been given this equation int x^2(x^3-6)^3 dx using u = x^3 -6 but i dont understand how to do it please help
*Sunday, November 15, 2009 at 12:02pm by Amelia*

**Calc ..basic integration**

I forgto how to integrate...its been to long. integration(Sqrt(1+2t^2+t^4))
*Thursday, February 18, 2010 at 1:22am by mm*

**math(easy integration)**

find the integration of absolute x from -4 to 2? could anyone show me the way to get 10? thanks
*Friday, May 27, 2011 at 8:40pm by ja*

**math**

use integration by parts to prove the following reduction formula: |cos^nx dx =1/n cos^(n-1)xsinx +(n-1)/n |cos(n-2)xdx
*Thursday, February 24, 2011 at 10:54am by daniel*

**Calculus**

I have to use integration by parts to integrate tan^-1 (1/x)dx. I'm not sure what to use as u or dv. We were taught to use uv-integral of (vdu) to do this.
*Wednesday, February 15, 2012 at 12:15am by Elaine*

**Calculus Problem**

I need to find the integral of e^(2x)sin(3x) I used integration by parts and I let u=e^2x and dv=sin(3x) My final answer was (-3/8)(e^(2x))(cos(3x)) - (1/8)(e^(2x))(sin(3x)) but it's wrong. Please help!!
*Friday, February 15, 2013 at 11:29pm by Confused*

**Calc**

evaluate the indefinite integral: x^13(cos(x^7))dx I've tried using integration by parts but I haven't ssem to be getting the right answer. I've used u=x^13 and dv=cos(x^7) and vice versa... much help is appreciated
*Thursday, February 26, 2009 at 1:41am by marcus*

**Calculus**

"Evaluate the following indefinite integral using integration by parts: *integral sign* tan^-1(x) dx" I let u = tan^-1(x) and dv = dx. Is that right?
*Thursday, May 27, 2010 at 11:44pm by Stuck*

**anti derivative**

please help me find anti derivative of -sinx * cos^2x am i using integration by parts?
*Wednesday, November 19, 2008 at 2:47pm by mary*

**Calculus II**

Integrate using integration by parts (integral) (5-x) e^3x u = 5-x du = -dx dv = e^3x v = 3e^3x I wonder if this is right so far. = uv - (integral) v du = (5-x)(3e^3x) - (integral) (-3e^3x) =(5-x)(3e^3x) + (integral) (3e^3x) = (5-x)(3e^3x) + 9e^3x + C
*Sunday, December 30, 2012 at 5:23pm by Katie*

**MATHS-PARABOLA**

using integration find the area of the region enclosed between the circle x^2+y^2=16 and the parabola y^2 = 6x
*Saturday, March 2, 2013 at 1:37pm by anchal*

**Science**

Why is it rare for the soft parts of an organism to become a fossil? A. the soft parts take a long time to decay. B. the soft parts can be eaten by other animals.* C. the soft parts cannot be buried in sediment. D. the soft parts form petrified fossils.
*Wednesday, October 30, 2013 at 1:21pm by Anonymous*

**Calc**

First make an appropriate substitution and then use integration by parts to evaluate the indefinite integrals: ∫ sinx cos³x e^(1-sin²x) dx I was going to substitute u= 1 - sin²x, but then i got du = ½ sinxcosx - ½ xdx, so im stuck. Thank you so much!!
*Tuesday, October 18, 2011 at 9:02pm by Erica*

**integrate**

how do i integrate 2u du /u-2+2u^2 so i used subsitution rule? or can i used integration by parts and how? thanks in adnvace
*Wednesday, October 8, 2008 at 6:15pm by allison*

**Integration**

ç e^ãx / ãx dx Your symbols are not legible. Please retype using normal keyboard characters Integration of e^radicalx / radicalx dx
*Thursday, November 30, 2006 at 10:37pm by Ash*

**AP Calculus BC**

Hi! Thank you very much for your help--- I'm not sure what the answer to this is; how do I solve? Find antiderivative of (1/(x^2))[sec(1/x)][tan(1/x)]dx I did integration by parts and got to (1/(x^2))[sec(1/x)] + 2*[antiderivative of (1/(x^3))(sec(1/x))dx]
*Tuesday, November 23, 2010 at 1:48am by APpreciative student*

**calculus**

The figure shows the region bounded by the x-axis and the graph of . Use Formulas (42) and (43)-which are derived by integration by parts-to find (a) the area of this region; (b) the volume obtained by revolving this region around the y-axis.
*Saturday, May 29, 2010 at 9:44am by rene*

**Differential Equations!**

I'm struggling solving this separable differential equations: (du/dv) = ((uv+u)/(uv+v)) I multiplied both sides by dv to get on the left side just du and cancel out dv, but after that don't know where to go. I've tried integration by parts but it doesn't look right! Any help ...
*Sunday, January 13, 2013 at 12:23am by Massiel*

**maths**

integrate by parts çx (lnx)^2 dx
*Saturday, December 29, 2012 at 8:09am by lucy*

**calculus**

integration by parts: 1. e^(sqrt(3x+9)) 2. sin(lr) are the answers: 1. 2e^(sqrt(3x+9))(sqrt(3x+9)-1) + C 2. -r cos(lnr) + sin(lr) + C
*Sunday, May 27, 2007 at 1:16pm by cory*

**math**

integration by parts: 1. e^(sqrt(3x+9)) 2. sin(lr) are the answers: 1. 2e^(sqrt(3x+9))(sqrt(3x+9)-1) + C 2. -r cos(lnr) + sin(lr) + C
*Monday, May 28, 2007 at 1:51pm by cory*

**math**

I'm trying to find the convolution f*g where f(t)=g(t)=sin(t). I set up the integral and proceed to do integration by parts twice, but it keeps working out to 0=0 or sin(t)=sin(t). How am I supposed to approach it? integral (sin(u)sin(t-u)) du from 0 to t.
*Thursday, December 3, 2009 at 2:38pm by chuck*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4) ln x dx between 3 and 0. I tried this problem two different ways and got two different answers 1.63 and 3.89. which one is correct? Please.
*Sunday, November 27, 2011 at 6:19pm by Jane*

**Mathematics**

A machine takes 4.2 hours to make 7 parts. At that rate, how many parts can the machine make in 28.8 hours 48 parts 41 parts 172 parts 17 parts
*Wednesday, November 21, 2012 at 3:18pm by Nono*

**Integral calculus**

Please can anyone help with the following problems - thanks. 1) Integrate X^4 e^x dx 2) Integrate Cos^5(x) dx 3) Integrate Cos^n(x) dx 4) Integrate e^(ax)Sinbx dx 5) Integrate 5xCos3x dx The standard way to solve most of these integrals is using partial integration. So, look ...
*Friday, April 13, 2007 at 9:05am by Febby*

**calculus**

how do you solve the integral of 1/[(square root of x)(lnx)] from 2 to infinity? i did the p- integral theorem with 1/square root of x and got it to be a divergent integral. however i was told this was the wrong way and that i should do it by integration by parts. but i can't ...
*Tuesday, August 25, 2009 at 7:52pm by kathryn*

**maths**

How to divide equally a 6cm line into 7 equall parts?
*Tuesday, October 16, 2012 at 1:16pm by nanbala*

**Maths**

divide 27 into two parts such that their product is 176
*Sunday, February 16, 2014 at 8:14am by Mazaa*

**human service**

This is my ask I have to answer. explore the existing integration of mediation and advocacy within a human services agency on a national or international level. Where would I find the answer to this. I belive I am not understanding the meaning of integration.
*Monday, September 12, 2011 at 7:50pm by Patiance*

**math**

maths (integ) voltage v=25sin50πt is applied on a circuit. using integration, find mean and RMS over range t=0 to 10ms . i got it to 25/2πt^2 cos(2π/9)+c but im not sure that im going the righ way.
*Monday, April 21, 2014 at 6:16am by not a lemon*

**possible functions**

How to find all possible functions of f with a given derivative. 1. f'(x) = 2 2. f'(x) = sinx Integrate each function. Remember that there can be an arbitrarcontant C added to each integral. 1. f(x) = x + C 2. f(x) = -cos x + C We haven't learned integration yet. Is there any ...
*Sunday, October 29, 2006 at 9:12am by Jen*

**Calculus**

I'm having trouble reversing the order of integration of ∫∫dxdy from a=0 to b=2(3)^(1/2) for x and c=y^(2/6) to d=(16-y^2)^(1/2) for y. I graphed the region of integration and that still doesn't really help me. i got approximately 7.9 for the ∫∫dxdy ...
*Wednesday, March 21, 2012 at 4:07am by Brandon*

**calculus-integration!**

should i use substitution?? if yes how should should i use it? plz i need some directions? k plz someone?...so far i used trig. substitution. i got a=8, so i used x=asin(è)so according to this substitution i got x=8sin(è) and dx=8cos(è) dè...then i used used the plug them in ...
*Sunday, May 6, 2007 at 4:25pm by Maria*

**Math/Calculus**

How would I integrate the following by parts: Integral of: (x^2)(sin (ax))dx, where a is any constant. Just like you did x^2 exp(x) below. Also partial integration is not the easiest way to do this integral. You can also use this method. Evaluate first: integral of sin(ax)dx...
*Monday, May 28, 2007 at 11:15pm by COFFEE*

**Statistics**

In a survey of adults throughout the caribbean 75% strongly support Caribbean integration. You randomly select 24 adults, throughout the Caribbean, and ask each if they strongly support Caribbean integration. What is the probability that at most 15 adults say they strongly ...
*Thursday, October 28, 2010 at 1:45pm by Special*

**calc**

also: integral of tan^(-1)y dy how is integration of parts used in that? You write: arctan(y)dy = d[y arctan(y)] - y d[arctan(y)] Here we again have used the product rule: d(fg) = f dg + g df You then use that: d[arctan(y)] = 1/(1+y^2) dy So, the integral becomes: y arctan(y...
*Wednesday, May 23, 2007 at 5:34pm by marsha*

**calculus**

Use integration by parts to evaluate the integral of x*sec^2(3x). My answer is ([x*tan(3x)]/3)-[ln(sec(3x))/9] but it's incorrect. u=x dv=sec^2(3x)dx du=dx v=(1/3)tan(3x) [xtan(3x)]/3 - integral of(1/3)tan(3x)dx - (1/3)[ln(sec(3x))/3] - [ln(sec(3x))/9] What am I doing wrong?
*Saturday, August 30, 2008 at 6:05pm by Integration by Parts*

**calculus**

Assuming that: Definite Integral of e^(-x^2) dx over [0,infinity] = sqrt(pi)/2 Solve for Definite Integral of e^(-ax^2) dx over [-infinity,infinity] I don't know how to approach the new "a" term. I can't use u-substitution, integration by parts, partial fractions, or trig ...
*Monday, January 14, 2008 at 1:46pm by mathstudent*

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