Question

If f(x) = log2 (x + 4), what is f^(−1)(3)?

Answer 1

Find the inverse first, then substitute x for 3.

Answer 2

inverse of what?

Answer 3

Inverse of f(x), it says so in the question.

Answer 4

so what would be the inverse of x here

Answer 5

Not the inverse of x, the inverse of the function!

Answer 6

To find the inverse of a function, use the following procedure!
change f(x) to y
switch the positions of y and x
solve for y
the new function is the inverse.

Answer 7

where is there a y...

Answer 8

There isn't a y. He said change f(x) to y. Like this

f(x) = log2 (x + 4),

y=log2 (x+4)