Odd numbers can be represented as (1) n(n+1) (2) n(n+1)/2 (3) n^2 (4) 2n ± 1

Question

Odd numbers can be represented as

(1) n(n+1)

(2) \(\frac {n(n+1)}{2}\)

(3) n²

(4) 2n ± 1 

Answer 1

Correct option is (4) 2n ± 1 

An odd number can be represented as 2n ± 1, where k is an integer (0, 1, 2, ...).