Asked by John

I got all of the hw except this one. The series comes out to be..
2, 6, 12, 20, 30, 43, 56, 72, 90, 110
differences are +4, + 6, + 8 all the way up to +20
It isn't arithmetic right? It isn't geometric right?
Is there another formula or do I just add the numbers?
What am I missing. Thanks.
Answered by toca coco
hi idk the answer but i need some help this guy said that ima cheater but i dont cheat i just give the answers to them is he right? :[
Answered by mathhelper
look at this pattern:
2 = 1*2
6 = 2*3
12 = 3*4
20 = 4*5
can you see what is happening?

I would say that
term(n) = n(n+1)

Not arithmetic, nor geometric
Answered by John
Yes thank you.

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