What is the integral of xe^-x?


by Grimertop90
Tags: antiderivative, calculus, exponential, integral
Grimertop90
Grimertop90 is offline
#1
Sep10-08, 04:42 PM
P: 1
I feel really dumb for not remembering this.... I'm drawing a total blank as to the antiderivative of xe-x or how to find it. Do I need to use a u substitution?
Phys.Org News Partner Science news on Phys.org
Internet co-creator Cerf debunks 'myth' that US runs it
Astronomical forensics uncover planetary disks in Hubble archive
Solar-powered two-seat Sunseeker airplane has progress report
quasar987
quasar987 is offline
#2
Sep10-08, 05:08 PM
Sci Advisor
HW Helper
PF Gold
quasar987's Avatar
P: 4,768
Try integration by parts.
HallsofIvy
HallsofIvy is offline
#3
Sep10-08, 09:09 PM
Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 38,904
Let u= x, dv= e-xdx.

Count Iblis
Count Iblis is offline
#4
Sep11-08, 11:39 AM
P: 2,159

What is the integral of xe^-x?


You can also compute the intergal of exp(-a x) and then differentiate w.r.t. the parameter a.


Register to reply

Related Discussions
integral more general then Lebesgue integral? Calculus 7
Changing cartesian integral to polar integral Calculus 1
integral - Double integral Calculus & Beyond Homework 2
QM Integral and Online Integral Tables Calculus 5
Integral using integral tables Calculus 2