Question

Find the sum of first 'n' odd positive integers

Answer 1

first odd positive no. (2k+1)

Answer 2

first odd no. =1 =a
difference between two odd numbers=2 =d
no of odd numbers=n
Sn=(n/2){2a +(n-1)d}
=(n/2){2+(n-1)2}
=n(1+n-1)
${n}^{2}$