Question

If the range of the function f(x)=x4 is {28, 30, 32, 34, 36}, what is its domain?

Answer 1

f(28)=4x  f(28)=4(7)          (7,28)
f(30)=4x  f(30)=4(7.5)       (7.5,30)
f(32)=4x  f(32)=4(8)          (8,32)
f(34)=4x  f(34)=4(8.5)       (8.5,34)
f(36)=4x  f(36)=4(9)          (9,36)

If the domain is the x-coordinates than its 7, 7.5, 8, 8.5, 9