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Q.The function f(x)=sinx+cosxf(x) = |\sin x| + |\cos x| is

a
differentiable everywhere
b
not differentiable at x=kπ/2x = k\pi/2
c
not differentiable at x=kπx = k\pi
d
periodic with period π/2\pi/2

Correct Answer: Option B

The correct solution involves applying the fundamental concept to derive the final value step by step...

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