If `f(x) = x^(3)`sgn (x), then

If f(x) = sgn (cos x) , then f^(1)(pi/2) is

If f(x)=x^3sgn(x), then

Let f(x)=(1+x^(2))sgn x, then

f(x)= x^(3) sgn(x). Show that f(x) is differentiable at x=0.

Let f(x)=g(x)sgn(x^(3)+6x^(2)+11x+6) where sgn denotes signum function and f(x)=ax^(3)+x^(2)+x+1, then minimum number of points of discontinuity of the function f(x) is

Let f(x)=sgn (sgn (sgn x)). Then lim_(x to0) f(x) is

If f(x) = sgn (x^(2) -2x+ 3) then the value of f(x) is

If f(x)=sgn(cos x) then f'((pi)/(2)) is

Draw the graph of f(x) = "sgn"(x^(3) -x) .