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Homework Help: Evaluate the integral using integration by parts?

  1. Feb 13, 2012 #1
    1. The problem statement, all variables and given/known data
    Evaluate the integral.
    Integral = x f(x) dx from 0 to 1 when f(1) = 6, f'(1) = 7.
    Answer choices:
    A. 11/6 + 1/6 integral from 0 to 1 x^3f''(x)dx
    B. 11/12 - 1/6 integral from 0 to 1 x^3f''(x)dx
    C. 11/3 + 1/2 integral from 0 to 1 x^2f'(x)dx
    D. 11/3 - 1/2 integral from 0 to 1 x^2f'(x)dx
    E. 11/4 - 1/2 integral from 0 to 1 x^2f"(x)dx

    2. Relevant equations

    3. The attempt at a solution
    So just by looking at the answer choices, the method is integration by parts. Based on what was given, I determined that f(x)=x^2+5x. But that would give an integral of x(x^2+5x), which doesn't even need integration by parts to solve. I am stuck here and don't know how the answer choices are gotten.
  2. jcsd
  3. Feb 13, 2012 #2


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    Did you try integrating by parts?
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