On What Interval Is the Function $f ( x ) = \frac { x } { x ^ { 2 } + 1 }$

On what interval is the function $f ( x ) = \frac { x } { x ^ { 2 } + 1 }$ increasing?

A) $[ - 1,1 ]$

B) $[ - 1,2 ]$
C) $[ - 2,1 ]$
D) $[ - 2,2 ]$
E) $( - \infty , 1 ]$
F) $( - \infty , 2 )$

G) $[ - 2 , \infty )$

H) $( - \infty , \infty )$

Correct Answer:

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