1.

is The function `f(x)=(x^2-1)|x^2-3x+2|+cos(|x|)` is differentiable not differentiable at (a)-1 (b)0 (c)1 (d)2A. `-1`B. `0`C. `1`D. `2`

Answer» Correct Answer - A::B::C
`cos(|x|)=cosx`
`(x^(2)-1)|x^(2)-3x+2|=(x-1)|x-1|.(x+1)|x-2|`
The only point where f is not differentiable is `x=2`


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