Question

The function f:N to R is defined by f(n)=2^n. the range of function is:
a) the set of all even positive integer
b)N
c)R
d) a subset of set of all even positive integer

Answer 1

this question is of which class??

Answer 2

option d..

Explanation..if we substitute 1 for n we get 2 and if we substitute 3 for n we get 8...So it doesn't contain all even positive integers..so option D is the answer