For the function g defined by g(x) = a*x^2 + 24 where a is a constant, g(4) = 8. What is the value of g(-4)?
A-8
B8
C0
D-1
Answer & Solution
Correct answer: B. 8
g(4) = 16a + 24 = 8, so 16a = -16, a = -1. Now g(-4) = -1 * (-4)^2 + 24 = -16 + 24 = 8. Note: g is even in x for any constant a, so g(-4) = g(4) = 8.
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