Question

5. Find the sum of 10 + (-10) + 10 + (-10) + ... if the number of terms is 121​

Answer 1

Answer:

Step-by-step explanation:

121

Answer 2

Answer:

since the total no. of terms is 121 we know that the series will end with 10..

since all the pairs of -10 and 10 that comes before it gets cancelled, the remaining sum is 10

so ans is 10

hope it helps........