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[" 6.Show that the function "f" defined ...

[" 6.Show that the function "f" defined by "f(x)={[2x+3," if "-3<=x<-2],[x+1," if "-2<=x<0],[-x+2," if "0<=x<=1]" is not differentiable "],[" at "x=-2" and "x=0]

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