f(f(n))+f(n) = 2n+3, f(0)=1, find f(3)?

• f(f(n))+f(n)=2n+3..........(1)
  given f(0)=1
  so put in eqution (1) n=0 then
  f(1)+1=3
  f(1)=2
  
  
  again put n=1 in (1)
  we get
  f(2)=3
  and so on we get
  f(3)=4
• 12 years agoHelpfull: Yes(21) No(0)
• ans is 4 if n=0
  f(f(0))+f(0)=3
  f(1)=2 because f(0)=1 given
  so like that wise
  f(2)=3
  and f(3)=4
• 12 years agoHelpfull: Yes(4) No(0)
• answr:f(3)=4
• 12 years agoHelpfull: Yes(2) No(1)