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Can someone plug some numbers into a small equation real quick for me?:) -1, -7, -13, -19 plug into Sn = n/2(a1+an)
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3 votes
Can someone plug some numbers into a small equation real quick for me?:)

-1, -7, -13, -19

plug into
Sn = n/2(a1+an)

User Danilo Campos
by
5.2k points

1 Answer

4 votes
-13 times -7 equals -91
User Vineet Singh
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5.0k points
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