Let $f: \mathbb{R} \to \mathbb{R}$ be defined by $f(x) = x^{3}$. What is $f(-3)$?
A$27$
B$9$
C$-9$
D$-27$
Answer & Solution
Correct answer: D. $-27$
$(-3)^{3} = (-3)(-3)(-3) = 9 \cdot (-3) = -27$. A negative number cubed is negative.
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