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What is a limit?

Please explain the concepts behind limits.

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The limit has a very important meanings in our life.
For example,we cannot find the area of a circle without taking the limit.

We only know how to find the area of a polygon such as square and rectangle, the idea of finding the area of a circle is:
First we draw an equiangular polygon in the circle with all ...

Solution Summary

Some concepts behind limits are explained.