Question

integrate (t^-2)(e^t)dt

Answer 1

use integration by parts.

Answer 2

how exactly?

Answer 3

int (u *dv) = uv- int (v * du)

in this case, you let u=t^-2 and v= e^t

Answer 4

I tried that. doesn't work because du will become -2t^-3, which doesn't help.

Answer 5

so try dv=t^-2 and u=e^t. u may need to do integration by parts twice.

Answer 6

i tried that too. eventually the integral becomes lnt*e^tdt. How do you integrate that?

Answer 7

i don't think you can integrate this and get a transdencental function

Answer 8

thanks everyone.