Find the Interval(s) Where F Is Concave Down For $f ( x ) = - 4 x ^ { 4 } + 3 x ^ { 3 } - 5 x + 10$

question 61

Multiple Choice

Find the interval(s) where f is concave down for $f ( x ) = - 4 x ^ { 4 } + 3 x ^ { 3 } - 5 x + 10$

• A) \(\left( - \infty , \frac { 3 } { 8 } \right)\)
• B) (-?, 0) ? (3, ?)
• C) \((\left. 0 , \frac { 3 } { 8 } \right)\)
• D) (-?, 0) ? \(\left( \frac { 3 } { 8 } , \infty \right)\)
• E) (-?, 0)

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