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The setoff points where the function `f(x)` given by `f(x)=|x-3|cosx` is differentiable, is R (b) `R-{3}` (c) `(0,oo)` (d) none of these

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The setoff points where the function `f(x)` given by `f(x)=|x-3|cosx` is differentiable, is `R-{3}`
as f(X) is not differentiable at x=3
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