Question

Let f(x) = x2 - 16. Find f-1(x).

Answer 1

@asnaseer @PFEH.1999

Answer 2

to find the inverse: replace f(x) by y:

y = x^2 - 16

now invert x and y

x = y^2 - 16.

now put it back in the form of f(x) = y

y = sqrt(x + 16)

Answer 3

the new y is f-1(x)

Answer 4

\[f⁻¹(y) = \sqrt{y + 16}\]

Answer 5

here's the answer choices though so would it be B?

Answer 6

yes, B

Answer 7

okay thanks so much

Answer 8

glad to help :)