Suppose That the Functions F and G and Their Derivatives $g ( x + f ( x ) ) , x = 3$

Multiple Choice

Suppose that the functions f and g and their derivatives with respect to x have the following values at the given values of
x. Find the derivative with respect to x of the given combination at the given value of x.
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$g ( x + f ( x ) ) , x = 3$

A) $- 6$
B) 21
C) $- 36$
D) $- 42$