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PLEASE HELP 25 POINTS

PLEASE HELP 25 POINTS-example-1

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Answer:

an= n * (n+1)

Explanation:

2,6,12,20,.....

6-2 =4

12-6 = 6

So there is no common difference because these numbers are not the same

It cannot be an arithmetic difference

6/2 =3

12/6 =2

So there is no common ratio because these numbers are not the same

It cannot be geometric


2, 6, 12, 20,...

+4 +6 +8 +10

a1 =2

a2 =2*3

a3 = 2*6=2*2*3=3*4

a4=2*10=2*2*5=4*5

.....

a5 = 5*6 = 30

an= n * (n+1)

User Rugmangathan
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