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Math Help - Finding Inverses and Verify

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    Finding Inverses and Verify

    I need to find the inverse of the equation:

    f(x)=(2x+1)/(x+3)

    Please help me.
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  2. #2
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    Quote Originally Posted by takuto View Post
    I need to find the inverse of the equation:

    f(x)=(2x+1)/(x+3)

    Please help me.
    y = \frac{2x+1}{x+3}<br />

    swap x and y ...

    x = \frac{2y+1}{y+3}

    solve for y ...

    xy+3x = 2y+1

    xy-2y = 1-3x

    y(x-2) = 1-3x

    y = \frac{1-3x}{x-2} = f^{-1}(x)
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