QUESTION IMAGE
Question
las funciones f y g se definen a continuación.
$f(x) = -3x^3 - 2$ $g(x) = -3x + 4$
hallar $f(-2)$ y $g(7)$.
simplificar las respuestas tanto como sea posible.
$f(-2) = \square$
$g(7) = \square$
Step1: Calculate \( f(-2) \)
Substitute \( x = -2 \) into \( f(x) = -3x^3 - 2 \).
First, calculate \( (-2)^3 \): \( (-2)^3 = -8 \).
Then, \( -3\times(-8) = 24 \).
Finally, \( 24 - 2 = 22 \). So \( f(-2) = 22 \).
Step2: Calculate \( g(7) \)
Substitute \( x = 7 \) into \( g(x) = -3x + 4 \).
Calculate \( -3\times7 = -21 \).
Then, \( -21 + 4 = -17 \). So \( g(7) = -17 \).
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\( f(-2) = \boldsymbol{22} \)
\( g(7) = \boldsymbol{-17} \)