Question

The sum of the first n odd whole numbers is equal to ___.

Answer 1

1 + 3 + 5 + 7.......... nSo...u See it is a AP with D=2 Find its Sum

Answer 2

this can be done by applying A.P

Answer 3

a = 1 and d=2
so put formula\[n/2 [2a + (n-1)d]\]

Answer 4

n/2 [2(1) + (n-1)2]

n/2 [2+ 2n -2]
n/2 multiplied by 2n

so the answer is \[n^2\]