ap-calculus-ab 2012 Q20

ap-calculus-ab · Usa · practice-exam Composite & Inverse Functions Derivative of an Inverse Function
Let $f ( x ) = ( 2 x + 1 ) ^ { 3 }$ and let $g$ be the inverse function of $f$. Given that $f ( 0 ) = 1$, what is the value of $g ^ { \prime } ( 1 )$ ?
(A) $- \frac { 2 } { 27 }$
(B) $\frac { 1 } { 54 }$
(C) $\frac { 1 } { 27 }$
(D) $\frac { 1 } { 6 }$
(E) 6
Let $f ( x ) = ( 2 x + 1 ) ^ { 3 }$ and let $g$ be the inverse function of $f$. Given that $f ( 0 ) = 1$, what is the value of $g ^ { \prime } ( 1 )$ ?

(A) $- \frac { 2 } { 27 }$

(B) $\frac { 1 } { 54 }$

(C) $\frac { 1 } { 27 }$

(D) $\frac { 1 } { 6 }$

(E) 6