jee-advanced 2001 Q27

jee-advanced · India · screening Chain Rule Piecewise Function Differentiability Analysis

27. Which of the following functions is differentiable at $x = 0$ :
(A) $\cos ( | x | ) + | x |$
(B) $\cos ( | x | ) - | x |$
(C) $\sin ( | x | ) + | x |$
(D) $\sin ( | x | ) - | x |$

27. Which of the following functions is differentiable at $x = 0$ :\\
(A) $\cos ( | x | ) + | x |$\\
(B) $\cos ( | x | ) - | x |$\\
(C) $\sin ( | x | ) + | x |$\\
(D) $\sin ( | x | ) - | x |$\\

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