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need help with part (b)
part (a) was written because part is follow on from part (a).

* part (a)

i ve done part (a)

its written hence evaluate,
so integrate, e^(-x)(2+x)dx by parts.

lol, yeah..i skipped that part..but its still doable from what i wrote..

thnx guys i've been trying to figure out this Q by simple integration for the previous hr

by parts is required...

Anyway hw did u lyk my skills of writing this Q in paint ?? :P

very impressive.

Next time please use the equation tool we have here.
It is easy to see :)

ahaha thnx hartnn :))

welcome ^_^