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)

Question

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The Answer of 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)

Find the Interval(s) Where F Is Concave Down For f(x)=−4x4+3x3−5x+10f ( x ) = - 4 x ^ { 4 } + 3 x ^ { 3 } - 5 x + 10f(x)=−4x4+3x3−5x+10

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