f(1)=5
where f(x+y)=f(x)+f(y)
then f(7)=?

Solve this step by step.

• f(1)=5 ,f(1+1)=f(1)+f(1)=5+5=10,f(2)=10 ,f(3)=f(2+1)=f(2)+f(1)=10+5=15,f(4)=f(3+1)=f(3)+f(1)=15+5=20,f(7)=f(4+3)=f(4)+f(3)=20+15=35 f(7)=35
• 6 years agoHelpfull: Yes(1) No(0)
• can u plz give me the answer of this question
• 6 years agoHelpfull: Yes(0) No(0)