An Introduction to Limits: Definition, Formula, Types, and Rules

An introduction to limits: Definition, formula, types, and rules

In calculus, limits are frequently used to determine the values of the given functions at a specific point. It is widely used to define different branches of calculus like differentials, integrations, and continuity.

The limit can be finite or indeterminate, for calculating the indeterminate function problems there is a rule of limit known as L’hopital’s rule. The zero/zero, infinity by infinity, 0 power 0, etc. are said to be indeterminate functions.

In this article, we will learn about the definition, formula, types, rules, and examples of limits in calculus.

What is the limit in calculus?

In calculus, a limit is a number that a function approaches. Limits play a vital role in calculus for solving complex problems and defining various kinds of calculus.

The derivative, integral, and continuity used limits of calculus to find the differential, integral, and continuous points of the functions. It is denoted by “lim” with a specific point at its subscript.

The formula of limit in calculus

The formula used to find the numerical result of the function is given below.

It can be read as the limit of the function g(z) as z approaches v is N.

Types of limits in calculus

In calculus, limits have three kinds.

1.

Rules of limits

Here are some basic rules of limits.

1.     Sum rule:

2.     Constant rule

3.     Constant function rule

4.     Power rule

5.     Difference rule:

6.     Quotient rule:

7.     Product rule:

8.     L’hopital’s rule:

How to find limits?

Here are some solved examples of limits.

Example 1

Find the limit of 12z2 – 13z + 4yz + 14z5 + 12, as z approaches to 4.

Solution

Step 1: Use the notation of limit and write the function.

Step 2: Apply the notation of limits separately to each function by b using the sum, difference, and constant rule of limits.

Step 3: Write the constant coefficients outside the limit notation by using the constant function rule of limits.

Step 4: Now substitute 4 in the place of z in the above expression.

You can also use a limit calculator with steps to avoid a large number of steps to get the result. Follow the below steps to use this tool.

Step 1: Enter the function.

Step 2: Select the variable.

Step 3: Select the type.

Step 4: Enter the limit value.

Step 5: Press the calculate button.

Example 2

Find the limit of (2z2 + 3z + 19 - 19) / (12z – 2 + 2), as z approaches to 0.

Solution

Step 1: Use the notation of limit and write the function.

Step 2: Apply the notation of limits separately to each function by b using the sum, difference, quotient, and constant rule of limits.

Step 3: Write the constant coefficients outside the limit notation by using the constant function rule of limits.

Step 4: Now substitute 0 in the place of z in the above expression.

Step 5: As the given function make an indeterminate form after applying the limit, so apply the L’hopital’s rule.

Summary

Now you can grab all the basics of limits in calculus from this post. We have discussed almost everything about the limit. You can solve y problem of limits easily by using the rules of limits.