Question

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

Answer 1

So assume y = f(x) = 2x - 2/4

Answer 2

So what will x be in terms of y?

Answer 3

so i swich x and y around right?

Answer 4

not exactly,
as y=2x-(2/4)

Answer 5

y+(2/4) = 2x

Answer 6

So what will be x?

Answer 7

3?

Answer 8

Nope

x = (y-(2/4))/2

Answer 9

Now plug in y = 3

Answer 10

You will get the value of x which is f^-1(3)

Answer 11

so x =3-(2/4)/2

Answer 12

yup

Answer 13

how do i solve that?

Answer 14

well it is (3-(2/4))/2

Answer 15

so i.e (3-0.5)/2

Answer 16

1.25

Answer 17

yup

Answer 18

thats not a choice i have

Answer 19

Sorry I made a mistake in the signs earlier

Answer 20

1.75?

Answer 21

yup