Question

I really need help.



Write the inverse function for the function, f(x) = 1/2x + 4. Then, find the value of f-1(4).

Answer 1

Okay so to solve for the inverse function, You substitute 'y' for f(x), then switch the y and the x. Then resolve for the y to get the inverse function.

Answer 2

y=1/2x+4 then
x=1/2y+4 then
x-4=1/2y then
x-2=y

Right?

Answer 3

uh no

Answer 4

\[x-4=\frac{1}{2}y\\
2x-8=y\]

Answer 5

Oh I get it thank you so much.

Answer 6

yw