Let f x cosx 10x 3x2 x3 2 x 3 then the absolute minimum value of f x is ........

Let f(x) = cos $\pi$ x + 10x+3x² +x³, -2 $\leq$ x $\leq$ 3 , then the absolute minimum value of f(x) is

-15

3-2 $\pi$

None of these

-15

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