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Find a formula for the inverse of the function.

f(x) = 4x - 1 / (2x+3)

Added Mon, 08 Jun '15

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First, replace f(x) with y for comfort.

y = 4x - 1 / (2x+3)

Now solve for x.

>> 2yx + 3y = 4x - 1

>> 2yx - 4x = -3y - 1

>> x(2y - 4) = -3y - 1

>> x = -3y - 1 / (2y - 4)

Added Mon, 08 Jun '15

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