The uniqueness of the limit is that only one number can be approximated in the end. A series can't get closer and closer to A and B, A ≠ B in the end.

"Limit" is the basic concept of calculus, a branch of mathematics. The "limit" in a broad sense is "infinitely close and never reached".

In mathematics, "limit" means that a variable in a function gradually approaches a certain value A in the process of getting bigger (or smaller), and "it can never coincide with A" ("it can never be equal to A, but taking a value equal to A' is enough to obtain a high-precision calculation result), and the change of this variable is artificially defined as" forever approaching ".

Matters needing attention in finding limit function

When using the above two to find the function limit, we should pay special attention to the following points. First, we should prove the convergence by monotone bounded theorem, and then find the limit value. 2. The key to applying the pinch theorem is to find functions with the same limit value, and when they meet the limit value, they tend to the same direction, thus proving or finding the limit value of the function.