f(x)=(x2-1) mod(x2-3x+2) + cos(mod(x)) is not differentiable at
a.1
b.2
c.0
d.n.o.t
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2 Answers
62The only points of contention are
x=1, 2 and x=0
when x=0, the function will be differentiable.. bcos the left term will not interfere!
when x=1 or 2, the right term will not interfere so we dont have to worry about cos x
the derivative of the Left term is
2x(x2-3x+2) + (x2-1)(2x-3)
at x=1, this is zero
at x=2, this is not zero .. hence it is not differentiable at x=2
