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Let f(x)=x2xf ( x ) = x - \frac { 2 } { x }

Question 89

Multiple Choice

Let f(x) =x2xf ( x ) = x - \frac { 2 } { x } . Then f(x) f ^ { \prime } ( x ) is


A) 13x21 - \frac { 3 } { x ^ { 2 } }
B) 12x21 - \frac { 2 } { x ^ { 2 } }
C) 1
D) 1+2x21 + \frac { 2 } { x ^ { 2 } }
E) 1+3x21 + \frac { 3 } { x ^ { 2 } }

Correct Answer:

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