The question below

Question

Find the inverse function of f.

f(x) = 4 + 9 + x

f⁻¹(x) =   ,    x ≥ 4

Find the inverse function of f.

f(x) = 25/x^2

,    x > 0

f ⁻¹(x) =   ,    x > 0

Answer 1

Swap x for f(x) in the equation and y for the original x.

Then solve for y

then substitute f(x) for y in your answer

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x = 4 +√9 + y

now solve for y…

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x = 25/(y2)

now solve for y

once y2 is isolated, you have to

find square root of the other side.

CAREFUL: Because its an equation,

any leftover radical is ±