1.

Then number of points in R in which the function f(x) = |x – 1| + |x – 3| + sin x is not differentiable, is …(a) 3 (b) 2 (c) 1 (d) 4

Answer»

(b) 2 

f(x) = |x – 1| + |x – 3| + sin x is not differentiable at x = 1, and x = 3



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