Question

Given f(x) = 2x-2/4 solve for f-1(3)

Answer 1

2x-2/4 or (2x-2)/4 ?

Answer 2

whatever the case is
solve f(x)=3 for x and that value will be f^(-1)(3)

Answer 3

So -3? @freckles

Answer 4

I don't think (2x-2)/4=3 gives you x=-3
could be wrong though

Answer 5

my answer choices are
1
5
7
8

Answer 6

solve this correctly and you have your answer \[\frac{2x-2}{4}=3 \]

Answer 7

thats not one of my choices

Answer 8

lol you have to SOLVE IT!

Answer 9

I don't understand how!

Answer 10

undo the division by 4 by multiplying both sides by 4

Answer 11

\[ 4 \cdot \frac{2x-2}{4}=4 \cdot 3\]

Answer 12

The 4's on the left hand side will cancel since 4/4=1

Answer 13

What am I putting in for x?

Answer 14

no no you are solving for x

Answer 15

\[\cancel{4} \cdot \frac{2x-2}{\cancel{4}}=4 \cdot 3 \]

Answer 16

Come on I know you can solve 2x-2=12

Answer 17

give it a try

Answer 18

2x=14

Answer 19

ok one last step

Answer 20

7 right?

Answer 21

\[f(7)=3 \text{ implies } f^{-1}(3)=7\]

Answer 22

Thank you! Can you help me with two more?

Answer 23

@freckles