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7 June, 15:02

The sum of an 84-number series is - 7,980. What is the sum of the first and last numbers?

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  1. 7 June, 15:23
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    - 190

    Step-by-step explanation:

    Since the sum of 84 number series is - 7980. We have to find the sum of first and last numbers. Since sum of an arithmetic sequence is represented as. S =. (First + last) =. So the total of first and last term is (-190). Option B. - 190 is the correct option.
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