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# X e x 2 inttegral 11:10 AM #4, i dont quite understand? Inttegral of xe(-x2)dx a-infinite, binfinite, the Answer in my textbook is 0, i dont know how to approach the problem? Feb 1st 2009, 11:07 AM #1, i cant seem to get this in any way? You'll be able to enter math problems once our session is over. Feb 1st 2009, 11:14 AM #8 i tried subs. Feb 1st 2009, 11:16 AM #10 okay idid that but then i would have to integrate e-(u)2how can i do that Feb 1st 2009, 11:17 AM #11 i have this integral of -1/2(e-(u2) Feb 1st 2009, 11:20 AM #12 Originally Posted by zangestu888 okay idid that but then.

Displaystyle int _-infty infty e-x2,dxsqrt. You just have to use this little fact: If displaystyle f(x) is an odd function, then displaystyle int_-aa f(x). What is the derivative of displaystyle e-x2? Feb 1st 2009, 11:14 AM #9, originally Posted by zangestu888 x hamster chica disfruta sola Wel i know how to split it up i got that part, my problem is integrating the functioon after the split? I know this i have to break it up into to several integrals, but i dont know how to integrate the function. Feb 1st 2009, 11:11 AM #6, originally Posted by o_O, hello Kurosaki. Because of the symmetry in the origin you should get zero. So thier is no actual way of doing it only just by the fact that its an odd function? Feb 1st 2009, 11:09 AM #2, hello Kurosaki. Then use the fundamental theorem of calculus. Best Answer: x2 e(2x) videos porno gratis con regla dx integrate by parts twice let u x2 : du 2x dx dv e(2x) dx : v (1/2)e(2x) x2 e(2x) dx (1/2) x2 e(2x) - x e(2x) dx again integrate x e(2x) dx by parts let u x :.

Inttegral of xe(-x 2)dx a-infinite, binfinite.The Answer in my textbook is 0, i dont know how to approach the problem? ### Improper Integral xe-( x 2 )

Integrals of tann( x ) : m/playlist? Integrals with sqrt( x 2 -1) : m/playlist? frac1 2 xe- x 2 rightvert _0infty frac1 2 int_0infty e - x 2,mathrmd x left( lim_crightarrow infty -frac1 2 ce-c 2 right) frac1 2 0e-0 2 frac1 2 int_0infty e - x 2,mathrmd x 00frac1 2 int_0infty e - x 2,mathrmd x frac1. Integrals of cosn( x ) : m/playlist? Integrals of 1/sinn( x ) : m/playlist? Hence, it is just for clarity for beginners so they can follow better this way. The derivative of u is 2x which is a good indicator that substitution will work as there is a x dx in the problem. Integrals of ( x n 1 x 2 ) : m/playlist? Since f(- x )f( x ) the integral int_-infty infty f( x )mathrmd x 2 int_0infty f( x )mathrmd. Integrals with inverse tangent : m/playlist?

### Under displaystyle u -x2, du -2x,dx displaystyle int x, e-x2, dx - frac12 int eu,du Feb 1st 2009, 11:21 AM #13 omg lol am so stupied i didnt see that thanks!

Feb 1st 2009, 11:12 AM #7, wel i know how to split it up i got that part, my problem is integrating the functioon after the split? Let me take a look. Let displaystyle u -x2 du -2x,dx and switch the limits. Feb 1st 2009, 11:09 AM #3, originally Posted by zangestu888, i cant seem to get this in any way? Feb 1st 2009, 11:28 AM #14 Originally Posted by zangestu888 okay idid that but then i would have to integrate e-(u)2how can i do that displaystyle fracddxe-x2-2x e-2x so: displaystyle int x e-2x dx -frac12 e-x2 and so: displaystyle int_-inftyinftyx e-2x dxlim_ato -infty, bto inftyint_abx e-2x. That does not prove that the double limit exists, it only tells you what its value is if it does. And parts i didnt get anything after the split. To show this split the integral up into two pieces displaystyle int_-infty0 x e-x2,dx int_0infty x e-x2,dx and do each separately.

#### X e x 2 inttegral

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Here is an expression for. At this stage we can now substitute u back. As you can see all you have to do now is to integrate eu with respect to du which is a simple and straightforward integration. Ex2 x dx eu du: All that I am doing here is replacing x2 with u, and also replacing x dx with the expression found earlier. Finally, this is the answer. The second function is very important for many applications. The derivative of u is 2x which is a good indicator that substitution will work as there is a x dx in the problem. Back to our problem! So xe-x2 and e-x2 are elementary functions. All that I have done here is move x closer to dx and it is still the same expression. I was solving a differential equation by reduction of order, and was required to evaluate the indefinite integral. The only method that came to mind was inspection,.e. So we are trying to find the functions F(x) such that F x)xe-x2. The goal here is to get an expression where x dx is on one side and all the unwanted terms on the other side, hence it is just a simple matter of transposition. The substitution is.

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