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At What Value of X Does the Function $f ( x ) = \frac { 1 } { 1 + x ^ { 2 } }$

Question 262

Question 262

Multiple Choice

At what value of x does the function $f ( x ) = \frac { 1 } { 1 + x ^ { 2 } }$ change from increasing to decreasing?

A) 1
B) $- 1$
C) $- \frac { 1 } { 2 }$
D) 2
E) $\frac { 1 } { 2 }$
F) $- 2$
G) 0
H) $- \frac { 3 } { 2 }$

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