Question

1+2+3+……..+100 = ____

(a) 5025
(b) 500
(c) 5050​

Answer 1

1+2+3+500+100= 606

hope it is help you .

Answer 2

1 + 2 + 3 + ..... + 100

❥ a = 1 , d = 1 , n = 100

Sn = n/2 ( 2a + ( n - 1 ) d )

= 100/2 ( 2 x 1 + ( 100 - 1 ) 1 )

= 50 ( 2 + 99 )

= 50 ( 101 )

Answer ➡ 5050