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Let f : (–1, 1) --> R be a function defined by f(x) = max {-|x|, - √1-x^2 }.

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Let f : (–1, 1) --> R be a function defined by f(x) = max {-|x|, - √1-x2 }. If K be the set of all points at which f is not differentiable, then K has exactly 

(1) Two elements 

(2) Five elements 

(3) Three elements 

(4) One element

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1 Answer

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Best answer

The correct option is (3) Three elements.

Explanation:

Graph :

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