Find all critical numbers for the function $f ( x ) = \frac { 1 } { x ^ { 2 } - 9 }$ .
A)0
B)-3
C)0, -3
D)No Critical Number
E)3
F)3, -3
G)0, 3, -3
H)None of the above

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The Answer of Find all critical numbers for the function $f ( x ) = \frac { 1 } { x ^ { 2 } - 9 }$ .
A)0
B)-3
C)0, -3
D)No Critical Number
E)3
F)3, -3
G)0, 3, -3
H)None of the above

Find All Critical Numbers for the Function f(x)=1x2−9f ( x ) = \frac { 1 } { x ^ { 2 } - 9 }f(x)=x2−91​

Find All Critical Numbers for the Function $f ( x ) = \frac { 1 } { x ^ { 2 } - 9 }$