If f(x) = `x^(2) - 4` , for what real number values of x will f(f(x))= 0 ?

Let f and g be real functions defined by f(x)= 2x + 1 and g(x)= 4x- 7 . For what real numbers x, f(x) lt g(x) ?

If f(x)=2 for all real numbers x, then f(x+2)=

If 2f(x) + 3f(-x) = 15 - 4x for all real values of x , then show that f(x) = 3 + 4x.

Let f and g real functions defined by f(x) =2x +1 and g (x) = 4x-7 . (i) For what real number x,f(x)=g(x)? (ii) for what real number x,f(x) < g(x) ?

f(x)=(x^(2)-4)/(x+2),x For what values of a and b is f(x)continuous on the real line

Let f(x)=x^(2)+kx;k is a real number.The set of values of k for which the equation f(x)=0 and f(f(x))=0 have same real solution set.

If f(x)=|x|-2|-2 for x in[-4,4] then the number of real solutions of f(f(x))=-1 is

Let f(x) = x +(1)/(2) then the number of real values of x for which the three unequal terms f(x) ,f(2x) ,f(4x) are in H.P is -