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Lesechka [4]
3 years ago
8

Find the inverse function of f(x)= square root of 2x+2

Mathematics
1 answer:
Alik [6]3 years ago
6 0

The inverse function of the above function is f(x) = \frac{x^{2} - 2}{2}

You can find the inverse of any function by switching the f(x) and x terms. Once you have done that, solve for the new f(x). Finally, what you'll have remaining is the inverse function. The work is done for you below:

f(x) = \sqrt{2x + 2} ----> Switch the x and f(x)

x = \sqrt{2f(x) + 2} ---> square both sides

x^{2} = 2f(x) + 2 ---> subtract 2 from both sides

x^{2} - 2 = 2f(x) ----> divide both sides by 2

\frac{x^{2} - 2}{2} = f(x) ----> switch the order for formatting sake.

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

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