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If f(1)=4 and f(x+y)=f(x)+f(y)+7xy+4,then f(2)+f(5)=?
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- Ans is 125
Find f(2)=19
f(3)= f(2+1) = 41
f(5)=f(2+3)=106
f(5)+f(2)=106+19=125 - 10 years agoHelpfull: Yes(8) No(0)
- F(2)=f(1+1)=F(1)+f(1)+7*1*1+4
f(2)=4+4+7+4=19
f(4)=F(2+2)=f(2)+f(2)+7*2*2+4=19+19+28+4=70
f(5)=F(4)+F(1)+7*4*1+4=70+4+28+4=106
f(2)+f(5)=106+19=25
- 10 years agoHelpfull: Yes(0) No(0)
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