brief calc

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evaluate the integral using integration by parts


  • 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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