# Calculus 1: Lecture 1.2 Finding Limits Graphically and Numerically | Summary and Q&A

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January 10, 2020
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The Math Sorcerer
Calculus 1: Lecture 1.2 Finding Limits Graphically and Numerically

## TL;DR

Limits in calculus determine the behavior of a function as it approaches a specific value.

## Key Insights

• ⛔ The limit of a function defines its behavior as the input value approaches a specific value.
• ⛔ The limit is denoted as the input value approaches a certain value and the output value approaches a specific value.
• ♾️ A limit is always a real number and can be positive infinity, negative infinity, or does not exist.

## Transcript

so this is the informal definition I was going to put definition and put it in quotes this is the informal definition of of a limit of a limits we're going to find limit so let so capital L be a real number so be a real number so capital L is going to be the limit right that's what we use L for variable right so L has to be a real number right so l... Read More

### Q: How is the limit of a function defined in calculus?

The limit of a function is defined as the output value of the function as the input value approaches a specific value. It represents the behavior of the function as it gets closer to a certain point.

### Q: What is the significance of the limit in calculus?

The limit allows us to understand the behavior of a function near a particular point and helps us analyze the function's value as the input value gets arbitrarily close to a specific value.

### Q: How do we determine if a limit exists?

A limit exists if the output value of the function approaches a particular value as the input value gets arbitrarily close to a specific value. If the function does not approach a specific value, or approaches positive or negative infinity, the limit is said to not exist.

### Q: Can a limit be any real number, including positive or negative infinity?

No, a limit can only be a real number. If the limit approaches positive or negative infinity, it is said to not exist.

## Summary & Key Takeaways

• Limits in calculus determine the behavior of a function as the input value approaches a particular value.

• The limit of a function is denoted as the input approaches a certain value and the output approaches a specific value.

• The limit is always a real number and can be positive infinity, negative infinity, or does not exist.