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## Homework Statement

Can someone please help me with integration of x(e^(-x-theta)) Thank you. My working is shown below

## The Attempt at a Solution

u = x, du = 1 dx, dv = e^(-x-theta)) v = e^-x+theta+1 / theta + 1

the rest can be seen in the attachment. Can you please check it out, it would be greatly appreciated.Thanks