Question

Integrate x/e^x

Answer 1

race, race!

Answer 2

parts parts parts

Answer 3

http://en.wikipedia.org/wiki/Integration_by_parts

Answer 4

Ok, so u= x and dv= 1/e^x?

Answer 5

http://upload.wikimedia.org/wikipedia/en/math/c/c/c/cccba9a4deecf8ed353b9a519eed0429.png

put f = x

Answer 6

Int by parts
\[\text{}=\int\limits e^{-x} \, dx-e^{-x} x\]
\[=-e^{-x} x-e^{-x}+c\]
\[=-e^{-x} (x+1)+c\]

Answer 7

\[\int xe^{-x}dx\]
\[u = x, du = 1, dv =e^{-x}, v =-e^{-x}\]

Answer 8

even without wolfram for this one

Answer 9

-xe^-x+e^-x...final answer

Answer 10

Thanks

Answer 11

You are welcome