Question

1+2+3+4+5+.............+1000

Answer 1

Hello Mortals

Let me solve this by AP.

a = 1
d = 1
Number of terms = 1000.

So,

Sum = 1000/2 ( 1 + 1000)
= 500 ( 1001)
= 500500.

Answer 2

I think it helps you to get your answer...