Question

@Mathematics Which function does not have an inverse?

A)f(x) = 2x + 10, x ≥ -5
B)f(x) = 2x + 10, x ≥ 0
C)f(x) = 2x2 + 10, x ≥ -5
D)f(x) = 2x2 + 10, x ≥ 0

Answer 1

Do you know how to do the "horizontal line test"?

Answer 2

no

Answer 3

Basically graph the function and draw a line that is horizontal (left to right). If that line touches the function more than once, anywhere, it is NOT invertible.

Answer 4

C