Question

If the domain of the function f(x) = –2x^2 – 3 is {-1,2,5), then the range is

A. {-53-11, 5)
B. {1, 13,97)
C. {-13,-7, -1)
D. {-13,-11, 1)

Answer 1

Answer A

Explanation:

Evaluate f(x) = -2x^2 - 3 at each element in {-1, 2, 5}:

f(-1) = -2(-1)^2 - 3 = -5

f(2) = -11

f(5) = -53

These results match the outputs in Answer A.