Question

If the range of the function f(x) = 4 − 4x is {-20, -16, -8, 0, 4}, what is its domain?

Answer 1

{0, 1, 2, 4, 6}

{2, 3, 5, 6, 7}

{1, 3, 5, 7, 9}

{0, 1, 3, 5, 6}

Answer 2

@Loser66

Answer 3

ok, you HAVE TO work on your problem, not me!! I guide you
solve for x:
4-4x =-20 , then x =??
4-4x= 4 , then x =??

Answer 4

x=4

Answer 5

@Loser66

Answer 6

Do one by one, ok?
4 -4x =-20
-4 both sides, what do you get?

Answer 7

-4x = -24

Answer 8

divided both sides by -4, what do you get?

Answer 9

x=6

Answer 10

yup, let it there. x =6
now, next, do the same with 4-4x =-16, what do you get for x?

Answer 11

-4x = -20

Answer 12

x =?

Answer 13

x= 5

Answer 14

so far, we have 6 and 5 right?
do the same with 4-4x = -8

Answer 15

x=3

Answer 16

next is 4-4x= 0

Answer 17

i got it thanks

Answer 18

ok