Determine the concavity of y = 3 + sin x on [0, 27

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A: Solution is given: Hope the solution is helpful.

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A: Let's find.

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A: The statement is TRUE  The detailed solution is as follows below:

Q: (1 point) Check by differentiation that y = 3 cos 2t + 3 sin 2t is a solution to y" + 4y = 0 by…

A: