1+3+5+7+ ………………… ধারাটির n-পদের সমষ্টি কত?

A n(n+1)

B n(n+1)/4

C n2

D {n(n+1)/2}2

Correct Answer: Option C

sum of 2 numbers = 1+ 3 = 4 = 2*2

sum of 3 numbers =1+ 3 + 5= 9=3*3

sum of 4 numbers = 1+ 3 + 5 + 7 = 16 = 4*4

sum of 5 numbers = 5*5 = 25

sum of n numbers =n*n