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### Q1. Which one of the following is not true always?

(a) If f(x) is not continuous at x = a, then it is not differentiable at x = a

(b) If f(x) is continuous at x = a, then it is differentiable at x = a

(c) If f(x) and g(x) are differentiable at x = a. then f(x) + g(x) is also differentiable

(d) if a function f(x) is continuous at x = a, then `Lim_(x->a)`

### Q5. The function f(x) = |x| + |x - 1| is

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