" If "f(x+y)=f(x)*f(y)" and "f(1)=4." Find "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 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 ) .

If f:RtoR satisfies f(x+y)=f(x)+f(y) for all x,yinRandf(1)=7 , then sum_(r=1)^(n)f(r) is :

If f:RtoR satisfies f(x+y)=f(x)+f(y), for all real x,y and f(1)=m. then: sum_(r=1)^(n)f(r)=

If f:RtoR 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:RtoR 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 (x) is a function such that f(x+y)=f(x)+f(y) and f(1)=7" then "underset(r=1)overset(n)sum f(r) is equal to :

If f (x) is a function such that f(x+y)=f(x)+f(y) and f(1)=7" then "underset(r=1)overset(n)sum f(r) is equal to :