Compute $f ^ { \prime } ( 5 )$ . $f ( x ) = \frac { 2.1 } { x }$

A) $f ^ { \prime } ( 5 ) = - 0.42$
B) $f ^ { \prime } ( 5 ) = - 0.084$
C) $f ^ { \prime } ( 5 ) = 0.084$
D) $f ^ { \prime } ( 5 ) = 1$
E) $f ^ { \prime } ( 5 ) = 2.1$

Name: Compute $f ^ { \prime } ( 5 )$ . $f ( x ) = \frac { 2.1 } { x }$ A) $f ^ { \prime } ( 5 ) = - 0.42$ B) $f ^ { \prime } ( 5 ) = - 0.084$ C) $f ^ { \prime } ( 5 ) = 0.084$ D) $f ^ { \prime } ( 5 ) = 1$ E) $f ^ { \prime } ( 5 ) = 2.1$
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Question

Compute $f ^ { \prime } ( 5 )$ .   $f ( x ) = \frac { 2.1 } { x }$  
 
A)  $f ^ { \prime } ( 5 ) = - 0.42$
B)   $f ^ { \prime } ( 5 ) = - 0.084$
C)   $f ^ { \prime } ( 5 ) = 0.084$
D)   $f ^ { \prime } ( 5 ) = 1$
E)   $f ^ { \prime } ( 5 ) = 2.1$

Quizplus · Accepted Answer

The Answer is B

Compute f′(5)f ^ { \prime } ( 5 )f′(5) f(x)=2.1xf ( x ) = \frac { 2.1 } { x }f(x)=x2.1​

Compute $f ^ { \prime } ( 5 )$ $f ( x ) = \frac { 2.1 } { x }$