" If "f:R rarr R" is defined as "f(x+y)=f(x)+f(y)AA x,y in R" and "f(1)=7," then find "sum_(r=1)f(r)

If f : R to R is defined as f (x+ y) = f (x) + f (y) AA x, y in R and f (1) = 7, then find sum _(r =1) ^(n) f (r).

If f:R to R is defined as f(x+y)=f(x)+f(y) AA x,y in R and f(1) = 7 , find sum_(r=1)^(n)f(r ) .

lf f: R rarr R satisfies, f(x + y) = f(x) + f(y), AA x, y in R and f(1) = 4, then sum_(r=1)^n f(r) is

If f:R rarr R satisfies f(x+y)=f(x)+f(y), for all x,y in R and f(1)=2 then sum_(r=1)^(7)f(1)

If f : R to R satisfies f(x + y)=f(x)+f(y) for all x, y in R and f(1)=7 , then sum_(r=1)^n f(r)

If f:R rarr R satisfies,f(x+y)=f(x)+f(y),AA x,y in R and f(1)=4,thensum_(r=1)^(n)f(r)

If f:R to R satisfies f(x+y)=f(x)+f(y), for all x, y in R and f(1)=7, then sum_(r=1)^(n)f( r) is

If f:R to R satisfies f(x+y)=f(x)+f(y), for all x, y in R and f(1)=7, then sum_(r=1)^(n)f( r) is