f(1)=4;and f(x+y)=f(x)+f(y)+7*x*y+2
find f(2)+f(5)

• f(2)=f(1)+f(1)+7*1*1+2=17
  f(4)=64
  f(5)=98
  f(2)+f(5)=115
• 11 years agoHelpfull: Yes(16) No(0)
• after substituting..
  f(2)=17
  f(3)=37
  f(5)=98.. so..f(2)+f(5)=17+98=115
• 11 years agoHelpfull: Yes(7) No(0)
• ans will be 158
• 11 years agoHelpfull: Yes(1) No(1)
• given f(1)=4
  so f(1+1)=f(2)=f(1)+f(1)+7*1*1+2=4+4+7+2=17
  now f(2+1)=f(3)=f(2)+f(1)+7*2*1+2=17+4+14+2=27
  so f(5)=f(3)+f(2)+7*3*2+2=27+17+42+2=88
  now f(2)+f(5)=88+17=105
  final answer is 105
• 11 years agoHelpfull: Yes(1) No(3)
• 531,f(2)=17,f(4)=64
• 11 years agoHelpfull: Yes(0) No(5)
• ans is 100
• 11 years agoHelpfull: Yes(0) No(6)
• ans is 117
• 11 years agoHelpfull: Yes(0) No(7)