## The Mathematical Symbol "Approaches the Limit (≐)"

Understanding the ≐ Symbol in Mathematics: Approaching Limits

The ≐ symbol in mathematics is indicative of a value or function "Approaching a Limit". This notation is central to the field of calculus and is often used to describe the behavior of functions as they get close to a certain point, without necessarily reaching it. This article will delve into two main contexts where this symbol is employed, providing two illustrative examples for each scenario.

## 1. Limits in Calculus

In calculus, ≐ is commonly used to denote that a function approaches a specific value as its variable approaches another value.

**Example 1:**To express that the function \( f(x) = x^2 \) approaches 4 as \( x \) approaches 2, we can write: \( f(x) ≐ 4 \) as \( x \to 2 \).**Example 2:**When describing the behavior of the function \( g(t) = \frac{1}{t} \) as \( t \) approaches zero from the positive side, it can be denoted as \( g(t) ≐ \infty \) as \( t \to 0^+ \).

## 2. Convergence in Series

Within the context of infinite series, the ≐ symbol can describe a series' tendency to converge to a particular value.

**Example 1:**If the infinite series \( \sum_{n=1}^{\infty} \frac{1}{n^2} \) has a sum \( S \), then the partial sums of the series can be represented as \( S_n ≐ S \) as \( n \to \infty \).**Example 2:**For the geometric series \( \sum_{k=0}^{\infty} \frac{1}{2^k} \) which converges to 2, the series' behavior can be captured as \( S_k ≐ 2 \) as \( k \to \infty \).

In summary, the ≐ symbol is a fundamental notation in mathematics, particularly in calculus and analysis. It captures the essence of functions, sequences, or series approaching a specific value or limit, providing a deeper understanding of their behavior in given contexts.

## Are You Good at Mathematical Symbols?

Do you know, or can you guess, the technical symbols? Well, let's see!**Gold**

**Silver**

**Bronze**

- This test has questions.
- A correct answer is worth 5 points.
- You can get up to 5 bonus points for a speedy answer.
- Some questions demand more than one answer. You must get every part right.
**Beware!**Wrong answers score 0 points.- 🏆 If you beat one of the top 3 scores, you will be invited to apply for the Hall of Fame.

**Scoring System**

Guru (+)

Hero (+)

Captain (+)

Sergeant (+)

Recruit (+)

## Codes for the ≐ Symbol

The Symbol | ≐ | |

Alt Code | Alt 8784 | |

HTML Code | ≐ | |

HTML Entity | ≐ | |

CSS Code | \2250 | |

Hex Code | ≐ | |

Unicode | U+2250 |

## How To Insert the ≐ Symbol

(Method 1) Copy and paste the symbol.

The easiest way to get the ≐ symbol is to copy and paste it into your document.Bear in mind that this is a UTF-8 encoded character. It must be encoded as UTF-8 at all stages (copying, replacing, editing, pasting), otherwise it will render as random characters or the dreaded �.

(Method 2) Use the "Alt Code."

If you have a keyboard with a numeric pad, you can use this method. Simply hold down the Alt key and type 8784. When you lift the Alt key, the symbol appears. ("Num Lock" must be on.)(Method 3) Use the HTML Decimal Code (for webpages).

HTML Text | Output |
---|---|

<b>My symbol: ≐</b> | My symbol: ≐ |

(Method 4) Use the HTML Entity Code (for webpages).

HTML Text | Output |
---|---|

<b>My symbol: ≐</b> | My symbol: ≐ |

(Method 5) Use the CSS Code (for webpages).

CSS and HTML Text | Output |
---|---|

<style> span:after { content: "\2250";} </style> <span>My symbol:</span> | My symbol: ≐ |

(Method 6) Use the HTML Hex Code (for webpages and HTML canvas).

HTML Text | Output |
---|---|

<b>My symbol: ≐</b> | My symbol: ≐ |

**0x2250**to place the ≐ symbol on your canvas. For example:

JavaScript Text |
---|

const x = "0x"+"E9" ctx.fillText(String.fromCodePoint(x), 5, 5); |

Output |

≐ |

(Method 7) Use the Unicode (for various, e.g. Microsoft Office, JavaScript, Perl).

The Unicode for ≐ is**U+2250**. The important part is the hexadecimal number after the

**U+**, which is used in various formats. For example, in Microsoft Office applications (e.g. Word, PowerPoint), do the following:

Type | Output |
---|---|

2250 [Hold down Alt] [Press x] | ≐ (The 2250 turns into ≐. Note that you can omit any leading zeros.) |

JavaScript Text | Output |
---|---|

let str = "\u2250" document.write("My symbol: " + str) | My symbol: ≐ |