Question

find the sum of (-20) + 20 + (-20) + 20 +... till the 315th term​

Answer 1

Answer:

Answer till the 315th term is - 20.

-20+20 will be cancelled and at 315th term - 20 will be left alone because if 316th term will come and it will be cancelled

So the sum of the 315th term is - 20