Question

f(x)=|x-1|+|x+1| is it differentiable at x=-1 and x=1

Answer 1

Hey dear!

Here is yr answer.......


f(x) = (x-1) + (x+1)

If x = -1

f(-1) = (-1-1) + (-1+1)

f(-1) = -2



If x = 1

f(1) = (1-1) + (1+1)

f(1) = 2



Yes, it is differentiable

Bcoz, -2 ≠ 2


Hope it hlpz...