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Let f(x)=cos1(x4)f ( x ) = \cos ^ { - 1 } \left( x ^ { 4 } \right)

Question 14

Multiple Choice

Let f(x) =cos1(x4) f ( x ) = \cos ^ { - 1 } \left( x ^ { 4 } \right) Then f(x) f ^ { \prime } ( x ) is


A) 4x31x2- \frac { 4 x ^ { 3 } } { \sqrt { 1 - x ^ { 2 } } }
B) 4x31x4- \frac { 4 x ^ { 3 } } { \sqrt { 1 - x ^ { 4 } } }
C) 4x31x6- \frac { 4 x ^ { 3 } } { \sqrt { 1 - x ^ { 6 } } }
D) 4x31x8- \frac { 4 x ^ { 3 } } { \sqrt { 1 - x ^ { 8 } } }
E) 4x31x8\frac { 4 x ^ { 3 } } { \sqrt { 1 - x ^ { 8 } } }

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