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Sagot :
The steps to find the inverse function are given in the development of the answer of this problem.
How to find the inverse function?
The inverse of a function y = f(x) is found exchanging x and y and isolating y.
In this problem, the function is:
[tex]f(x) = \sqrt{7x - 21}[/tex]
Then the steps to find the inverse function is given as follows:
[tex]y = \sqrt{7x - 21}[/tex]
[tex]x = \sqrt{7y - 21}[/tex]
[tex]x^2 = 7y - 21[/tex]
[tex]x^2 + 21 = 7y[/tex]
[tex]\frac{1}{7}x^2 + 3 = y[/tex]
[tex]\frac{1}{7}x^2 + 3 = f^{-1}(x)[/tex], where [tex]x \geq 0[/tex].
More can be learned about inverse functions at https://brainly.com/question/27942535
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