Question

Find the sum of first n natural numbers. Solution : First n natural numbers are 1, 2, 3, . . . , n. Here a = ……………………….., d = ……………., nth term =..........n by formula Sn=n/2 [first term + last term ]

Answer 1

Answer:

$S = 1 + 2 + 3 + 4 + 5 + .................... + n.$