# brief calc

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evaluate the integral using integration by parts

7xe^-x

• brief calc -

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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