If A={1,2,3...} and N is the set of natural numbers, then check whether and N are equal?

If A = {0,1} and N be the set of natural numbers. Then , the mapping f: N rarr A defined by f(2n-1) = 0 , f(2n) = 1, AA n in N , is onto.

If A= {1, 3, 5, 7, 9, 11, 13, 15, 17}, B= {2, 4, 6, 8,……….18} and N the set of natural numbers is the universal set, then {A' cup (A cup B) cap B'} is

Variance of first n natural number is …………

If the mean of first n natural numbers is (5n)/(9) , then find n

The mean of first n natural numbers is . . . . .

Calculate the mean deviation about the mean of the set of first n natural numbers when n is an odd number .

Taking the set of natural number as universal set and A= {x : x -8 =3} then A'="…………" .

Taking the set of natural numbers as the universal set, write down the complements of the following sets: { x : x ∈ N and 2x + 1 > 10 }

Let N be the set of natural numbers and the relation R be defined on N such that R={(x,y) : y=2x, y in N} ,

Taking the set of natural numbers as the universal set, write down the complement of the following sets. {x : x is a natural number divisible by 2 and 3}