Sequences: See the following attached image, where you can see sets of circles, which follow a certain pattern:
Number of circles in next row 6: 21 circles, and row 7: 28 circles

1) Determine the number of circles in the nth pile (general term)

2) What is the number of circles when n tends to infinity?

The sequence is

Each term is the sum of the consecutive numbers from 1 to that number.

The nth term is the sum of the first n numbers:

1) The number of circles in the nth pile is n(n + 1)/2

2) When n tends to infinity the number of circles tends to infinity

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step-by-step explanation:

answer: what are the following choices