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Which of the following functions is not differentiable in the domain $[-1,1]$ ?

(a) $f(x) = x^2$

(b) $f(x) = x-1$

(c) $f(x) = 2$

(d) $f(x) = Maximum (x,-x)$

asked in Calculus by Active (3k points)
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+2

@Hirak

$x^2$ is differentiable and $x-1$ is continuous and differentiable in the given domain.. make the graph of both and check.. 

+1
Sorry.. i have went terribly wrong, Thnaks a TON for making it right.. :)

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