Find the Largest Open Interval Where the Function Is Changing $f ( x ) = \frac { 1 } { 4 } x ^ { 2 } - \frac { 1 } { 2 } x$

question 88

Multiple Choice

Find the largest open interval where the function is changing as requested.
-Increasing $f ( x ) = \frac { 1 } { 4 } x ^ { 2 } - \frac { 1 } { 2 } x$

• A) \(( - \infty , \infty )\)
• B) \(( 1 , \infty )\)
• C) \(( - 1,1 )\)
• D) \(( - \infty , - 1 )\)

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