A curve has equation \( y = 2 x ^ { 3 } + \sin x \) . Find the exact value of \( \frac { d ^ { 2 } y } { d x ^ { 2 } } \) when \( x = \frac { \pi } { 2 } \) . [4]
Pregunta
Answer
\(= 6\pi- 1\)
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