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Let Q(x)=f(x)+f(1-x) and f''(x)lt0 for 0...

Let `Q(x)=f(x)+f(1-x) and f''(x)lt0` for `0ltxlt1` then on `(0,1/2)`

A

Q(x) is increasing

B

Q(x) is decreasing

C

Q(x) is constant

D

Q(x) is not increasing

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