Question

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

a. 1
b. 5
c. 7
d. 8

Answer 1

find the inverse of the equations by switching x and y, then solve for x.
after that plug 3 in for x

Answer 2

y=2x-2/4
switch x and y
x=2y-2/4
get rid of 4 on the right side.
so you multiply each side by 4
4x=2y-2
add 2 to each side
4x+2=2y
divide each side by 2
2x+1=y
now we have the inverse function
f(x)=2x+1

f(x) is same as y

Answer 3

now just plug 3 in for x
so 2(3)+1 is what?

Answer 4

7

Answer 5

thank you! c:

Answer 6

you're welcome