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\Given f(x)=2sinx+x on [0,2π] (a) Find f′′(x) (b) Find the intervals where f is concave up...

\Given f(x)=2sinx+x on [0,2π]

(a) Find f′′(x)

(b) Find the intervals where f is concave up and/or concave down.

(c) Find the point(s) of inflection express as an ordered pair.

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