The function `f: NvecN(N` is the set of natural numbers) defined by `f(n)=2n+3i s` (a) surjective only (b) injective only (c) bijective (d) none of these

The function f:N rarr N(N is the set of natural numbers) defined by f(n)=2n+3is (a) surjective only (b) injective only (c) bijective (d) none of these

The function f:NtoN,N being the set of of natural numbers, defined by f(x)=2x+3 is

f: R->R given by f(x)=x+sqrt(x^2) is (a) injective (b) surjective (c) bijective (d) none of these

Let R be set of real numbers. If f:R->R is defined by f(x)=e^x, then f is: (a) surjective but not injective (b) injective but not surjective (c) bijective (d) neither surjective nor injective.