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B
continuous
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C
discontinuous
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D
left continuous only
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Solution
The correct options are A differentiable B continuous limx→0+f(x)=tanhh=1 limx→0−f(x)=−tanh−h=1 Hene LHL=RHL=f(0) So it is continous at x=0 f′(x)=sec2xx−tanxx2 limx→0f′(x)=0 f′(0)=0. So, it is differentiable at x=0