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Mark the correct alternative in the following:
If f(x) = |x – a| ϕ(x), where ϕ(x) is continuous function, then
(i) A function f(x) is said to be continuous at a point x=a of its domain, iff
(ii) for right hand derivative
) for left hand derivative
f(x) = |x – a| ϕ(x)
using formula (ii)