AIEEE 2003 Math Solved Paper

Section: Mathematics

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Question : 57 of 66

Marks: +1, -0

If f:R→R satisfies f(x+y)=f(x)+f(y), for all x,y∈R and f(1)=7, then

n

∑

r=1

f(r) is

[AIEEE 2003]

‌
7n(n+1)
2
‌
7n
2
‌
7(n+1)
2
7n+(n+1)

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