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Thread: Integral Property Help!

  1. #1
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    Integral Property Help!

    Integral Property Help!-dasdasdasda.png

    I have no idea what the property this problem is refering to. But i did find out that if i plug 3 and the 2 in f(2x+1) i get F(7) - (F5)
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  2. #2
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    Re: Integral Property Help!




    $u=2x+1$

    $du=2 \, dx$

    $\displaystyle \dfrac{1}{2} \int_2^3 f(2x+1) \cdot 2 \, dx = 10$

    substitute and reset the limits of integration ...

    $\displaystyle \dfrac{1}{2} \int_5^7 f(u) \, du = 10$

    Note that $\displaystyle \int_5^7 f(u) \, du = \int_5^7 f(x) \, dx$
    Thanks from romsek and lc99
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    Re: Integral Property Help!

    Wow, you guys are godly. Like, how do you figure it out just from seeing the question! xD thanks so much
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    Re: Integral Property Help!

    The fact that you are told the integral of f(2x+ 1) while normally you do integrals of f(x) should have been a give away!
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