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9 votes
9 votes
Find the sum if the first 80 even integers beginning with -78

Will mark

User Liorda
by
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1 Answer

20 votes
20 votes

Answer:

162

Explanation:

sum (n=-39) (to 41) of (2n) = 162

It won't let me put in a picture, but that is the formula I used.

-39 is one half -78, because I'm using 2n

41 = -39 + 80

2n is so we only get even numbers

User Digital Ninja
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3.1k points