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posted by kyle on Tuesday, November 19, 2013 at 12:03am.
evaluate the integral using integration by parts 7xe^-x
u = 7x du = 7 dx dv = e^-x dx v = -e^-x ∫u dv = uv - ∫v du ∫7xe^-x dx = -7xe^-x + 7∫e^-x dx I think you can take it from there, no?
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