csat-suneung 2017 Q6

csat-suneung · South-Korea · csat__math-science 3 marks Differentiation from First Principles
For the function $f ( x ) = x ^ { 3 } + x + 1$, let $g ( x )$ be its inverse function. What is the value of $g ^ { \prime } ( 1 )$? [3 points]
(1) $\frac { 1 } { 3 }$
(2) $\frac { 2 } { 5 }$
(3) $\frac { 2 } { 3 }$
(4) $\frac { 4 } { 5 }$
(5) 1
For the function $f ( x ) = x ^ { 3 } + x + 1$, let $g ( x )$ be its inverse function. What is the value of $g ^ { \prime } ( 1 )$? [3 points]\\
(1) $\frac { 1 } { 3 }$\\
(2) $\frac { 2 } { 5 }$\\
(3) $\frac { 2 } { 3 }$\\
(4) $\frac { 4 } { 5 }$\\
(5) 1