If n is a positive integer, how many times does the function f(x) = x^2 + 5cosx change concavity in the interval 0 <= x <= 2*pi*n?(adsbygoogle = window.adsbygoogle || []).push({});

A) 0

B) 1

C) 2

D) n

E) 2n

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# Change in concavity of a function

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