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March 30, 2017

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Evaluate using u-substitution:

Integral of: 4x(tan(x^2))dx

Integral of: (1/(sqrt(x)*x^(sqrt(x))))dx

Integral of: (cos(lnx)/x)dx

  • Calculus II (#3 of 3) - ,

    Integral of: (cos(lnx)/x)dx
    let u = ln x
    du = dx/x
    Your integral is therefore that of
    cos u du, which is sin u = sin(ln x)

    Try the others yourself. In the first one, I would let x^2 = u

  • Calculus II - ,

    Integral 3x/x2(x-2)dx

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