Question

7. The sum of first n odd natural
number is .......​

Answer 1

Answer:

1 is that number and the sum is 2

Answer 2

$\huge\tt\underline\pink{ANSWER :-}$

The sequence of first n odd numbers is

1,3,5,7.........n

This forms an A.P with a=1 and d=2

S= n/2{2a+(n−1)d}[tex]

⇒S= n/2{2(1)+(n−1)2}

⇒S= n/2(2n)

⇒S=n ^2