CONTINUITY AND DIFFERENTIABILITY
www.ncert.nic.in › pdf › publicationCONTINUITY AND DIFFERENTIABILITY 93 f (f (x)) = 1 –1 f x = 1 –1 1 2 – –1 –1 x x x =, which is discontinuous at x = 2. Hence, the points of discontinuity are x = 1 and x = 2. Example 6 Let f(x) = x x , for all x ∈R. Discuss the derivability of f(x) at x = 0 Solution We may rewrite f as 2 2, if 0 ( ),if 0 x x f x x x ≥ = − < Now Lf ′ (0) =