Question

18. Calculate the sum:5 + (-5) + 5 + (-5) + ....5...(i) if the number of term is 10.(ii) If the number of terms is 11.​

Answer 1

Answer:

(i) 0

(ii) 5

Explanation:

If we notice the pattern, we will see that when we take even number of terms, the answer becomes zero. But if we take odd number of terms then the answer becomes five.