Let `f` be a one-to-one function from set of natural numbers to itself such that `f(mn)-f(m)xxf(n)` for all `m,n in N`. what is least possible value of `f(999)?`

Let f be real valued function from N to N satisfying. The relation f(m+n)=f(m)+f(n) for all m,n in N . The range of f contains all the even numbers, the value of f(1) is

Let f be real valued function from N to N satisfying. The relation f(m+n)=f(m)+f(n) for all m,n in N . The range of f contains all the even numbers, the value of f(1) is

Let f be real valued function from N to N satisfying. The relation f(m+n)=f(m)+f(n) for all m,n in N . The range of f contains all the even numbers, the value of f(1) is

Let f be real valued function from N to N satisfying. The relation f(m+n)=f(m)+f(n) for all m,n in N . The range of f contains all the even numbers, the value of f(1) is

Let f be a function from the set of all non-negative integers into itself such that f(n + 1) = 6f(n) + 1 and f(0) = 1 , then the value of f(4) – f(3)

Let f:N to N for which f(m+n)=f(m)+f(n) forall m,n in N .If f(6)=18 then the value of f(2)*f(3) is