Let f(x)={:{(x^(2)+4x",",-3lexle0),(-sin...

Let `f(x)={:{(x^(2)+4x",",-3lexle0),(-sinx",",0ltxle(pi)/(2)),(-cosx-1",",(pi)/(2)ltxlepi):}` then

x=-2 is the point of global minima

x=`pi` is the point of global maxima

f(x) is non-differentiable at `x=(pi)/(2)`

f(x) is discontinuos at x=0

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