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

question 47

Multiple Choice

Find all critical numbers for the function $f ( x ) = \frac { x - 1 } { x + 1 }$ .

• A)1
• B) \(- 1,1\)
• C) \(1 , - 1 , - 2\)
• D)0
• E) \(- 1\)
• F)2
• G) \(1 , - 1,2\)

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