Question

Let f(x) = 2x + 2. Solve f-1(x) when x = 4.

Answer 1

First find the inverse function by substituting y for f(x), switching x and y, and solving for y.

Answer 2

Can you do that?

Answer 3

im confused @joannaBlackwelder

Answer 4

Substitute y for f(x).
y=2x+2
Make sense?

Answer 5

Or do you not understand why I am trying to find the inverse function?

Answer 6

yes why are you finding the inverse

Answer 7

f^-1(x) is the inverse of f(x)

Answer 8

That is what the question asks for.

Answer 9

Ok, @jaimealexandra ?

Answer 10

oh ok @JoannaBlackwelder

Answer 11

Then, can you switch x and y?

Answer 12

On the function?

Answer 13

You with me?

Answer 14

kind of JoannaBlackwelder

Answer 15

x=2y+2
That is what I mean by switch x and y.

Answer 16

Make sense?

Answer 17

oh That makes sense @joannablackwelder

Answer 18

:) Now can you solve for y?

Answer 19

1? @JoannaBlackwelder

Answer 20

For the final answer?

Answer 21

If so, yup! :)

Answer 22

thankyou!!!! @JoannaBlackwelder

Answer 23

No worries. :) If you are satisfied with the help, please award a medal. Thanks!

Answer 24

how? @JoannaBlackwelder

Answer 25

Click the "Best response" button.

Answer 26

Thanks! :)