find the number of polynomial for a degree where f(x^2)=f(x)^2=f(f(x))

• i think 2
  f(x)=x and f(x)=-x
• 11 years agoHelpfull: Yes(3) No(0)
• may b 4
  i think f(x^2)=f(x)^2
  find f(f(x))
  so it beocmes
  f(x^2)=(x^2)^2=x^4
• 11 years agoHelpfull: Yes(2) No(0)