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Substitution in the indefinite integral help? I’m getting both of my answers wrong?

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3 Answers

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    u = e^(x/2)

    du = (1/2) * e^(x/2) * dx

    du / u^2 =>

    (1/2) * e^(x/2) * dx / e^(x) =>

    (1/2) * dx / e^(x/2)

    u(x) = e^(x/2) is what you're looking for.  Don't worry about the (1/2) bit in the numerator.  That can be factored out of the integral.

    Also, you can't have u = -e^(-u) as a substitution.

    u = e^(x/2)

    du = (1/2) * e^(x/2) * dx

  • Anonymous
    4 months ago

    Another homework cheater

  • ted s
    Lv 7
    4 months ago

     multiply  the integrand by e^x/e^x to get to du / u².....u = e^x

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