How many polynomial functions f of degree >= 1 satisfy f (x 2) = [f(x) ]2 = f(f(x) ) ?
(a)More than 2
(b)2
(c)0
(d)1

• f(x)=x^2 is the only equation that satisfies the rule
  ans: 1
• 11 years agoHelpfull: Yes(14) No(1)
• plz explain... clearly..
• 11 years agoHelpfull: Yes(4) No(0)
• y=x is only the function
  when f(2x)then y=2x
  now 2f(x)put then y=2x
  and f(f(x))=> y=x and again replace x with x it is same.
• 11 years agoHelpfull: Yes(2) No(4)