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 :

Let f(x) be a function such that f(x + y) = f(x)+f(y) AA x, y in N and f(1) = 4. If underset(k=1)overset(n) f (a+k) = 2n(33 + n) , then 'a' equals.......

Let f(x) be a function such that f(x + y) = f(x)+f(y) AA x, y in N and f(1) = 4. If underset(k=1)overset(n) f (a+k) = 2n(33 + n) , then 'a' equals.......

f is a function such that f(x + y) = f(x) .f(y), forall x, y in R , if f(1) = 3, then find sum_(r = 1)^n f(r) .

Let f be a function satisfying f(x+y)=f(x) *f(y) for all x,y, in R. If f (1) =3 then sum_(r=1)^(n) f (r) is equal to

Let f:R->R be a function such that f(x+y)=f(x)+f(y),AA x, y in R.

Let f:R->R be a function such that f(x+y)=f(x)+f(y),AA x, y in R.

Let f:R rarr R^(*) be a derivable function such that f(x+y)=3f(x)f(y),AA x,y in R with f(1)=(2)/(3) ,then sum_(r=1)^(oo)(1)/(f(r)) is equal to

Let f be a function such that f(x + y) = f(x) + f(y) forall x , y in R , if f(1) = k, then show that f(n) is equal to nk.

If f:R rarr R be a function such that f(x+2y)=f(x)+f(2y)+4xy, AA x,y and f(2) = 4 then, f(1)-f(0) is equal to

If f(x+y)=f(x)*f(y) and f(1)=4. Find sum_(r=1)^(n)f(r)