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Comments


• nm k @ 2023-08-08 08:44:53

  it doesn't work

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• Maryori @ 2014-03-07 11:01:58 (+1)

  For question #8c:I got$latex\ e^x(x^3-3 x^2-6 x-7)+C$I I used$latex\ u=x^3$$latex\ du=3 x^2 dx$$latex\ dv=e^x dx$ $latex\ v=e^x$$latex\ x^3 e^x-\int e^x 3 x^2 dx$I used the inaetgrrtion by parts again.$latex\ u=3 x^2$$latex\ du=6 x dx$$latex\ dv=e^x dx$ $latex\ v=e^x$ $latex\ x^3 e^x-3 x^2 e^x-\int 6 x e^x dx$inaetgrrtion by parts again:$latex\ u=6$$latex\ du=dx$$latex\ dv=e^x dx$$latex\ v=e^x$$latex\ x^3 e^x-3 x^2 e^x-6 x e^x-6 e^x-\int e^x dx$$latex\ e^x(x^3-3 x^2-6 x-6-1)+C$

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