rajajagz rajajagz

03-10-2018
Mathematics

contestada

Can someone plug some numbers into a small equation real quick for me?:)
-1, -7, -13, -19

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

Respuesta :

sophia7052 sophia7052

03-10-2018

-13 times -7 equals -91

Answer Link

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