" 18.If "f(x)=|x|^(3)," show that "f''(x)" exists for all real "x" and find "

If f(x)= |x|^(3) , show that f''(x) exists for all real x and find it.

If f(x)= |x|^(3) , show that f''(x) exists for all real x and find it.

If f(x) = |x|^(3) , show that f''(x) exists for all real x and find it

If f(x)=|x|^(3), show that f(x) exists for all real x and find it.

If f(x)=|x|^(3) , then show that f''(x) exists for all real x and find it.

If f(x) = |x|^3 show that f''(x) exists for all real x and find it.

If f(x)=|x|^3 , show that f"(x) exists for all real x and find it.

If f(x)=|x|^(3) show that show that exists for all real x and find it.

if f (x) = x^3 , show that f''(x) exist for all real values of x and find it.

A function f:R->R satisfies the relation f((x+y)/3)=1/3|f(x)+f(y)+f(0)| for all x,y in R. If f'(0) exists, prove that f'(x) exists for all x, in R.