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Question: What is a Limit ?

Answer:

A sequence of numbers has a limit of L if the numbers get closer and closer to L as the sequence proceeds so that the difference them and L approaches 0.

For example, the sequence 1.5, 1.25, 1.125, …., in which the nth term is 1 + (1/2)n, has a limit of 1. The terms of sequence get closer and closer to 1 as n increases. The difference between the numbers and 1 is (1/2)n and this tends to 0 as n increases.

The sequence 2.9, 2.99, 2.999, …, in which the nth term is 2.99…9 with n nines, has a limit of 3. A sequence of shapes can also have a limit. For example, the polygons have their vertices at a distance of 1 unit from the center. As the number of sides increases the polygons get closer and closer to a circle.