Given That $f ( x ) = x ^ { 3 } + a x ^ { 2 } + b x$

question 256

Multiple Choice

Given that $f ( x ) = x ^ { 3 } + a x ^ { 2 } + b x$ has critical numbers at $x = 1 \text { and } x = 3 \text {, }$ find a and b.

• A) \(- 9 ,\) 6
• B) - 8, 7
• C) - 7, 8
• D) - 6, 9
• E) - 9, 3
• F) - 8, 4
• G) - 7, 5
• H) - 6, 6

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