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Removing Discontinuities

Samuel Baker

Samuel Baker

7 min read

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Study Guide Overview

This study guide covers removing discontinuities in AP Calculus AB/BC. It focuses on identifying and removing removable discontinuities by factoring, canceling terms, and redefining the function. It also explains how to ensure continuity in piecewise functions by matching limits and function values at boundaries. The guide uses examples and practice problems involving both algebraic and graphical approaches to understanding continuity. Finally, it provides practice questions in multiple-choice and free-response formats.

#AP Calculus AB/BC: Removing Discontinuities - Your Ultimate Guide

Hey there, future AP Calculus master! 👋 Let's tackle discontinuities together, making sure you're super confident for the exam. We'll focus on making those tricky functions smooth and continuous. Let's dive in!

#1.13 Removing Discontinuities

This section is all about understanding and fixing those pesky breaks in graphs. Remember, a continuous function is one you can draw without lifting your pencil!

#⭕ What are Discontinuities?

Discontinuities are points where a function isn't... well, continuous. Think of them as gaps, jumps, or holes in your graph. We've got three main types, but we're focusing on removable discontinuities today.

Three Types of Discontinuities

Image courtesy of LibreTexts Mathematics


#📍 Removable Discontinuities

Removable discontinuities are like "holes" in a graph. The function isn't defined at that point, but the limit exists. We can "fill" this hole to make the graph continuous.

Key Concept

A removable discontinuity occurs when the limit of a function exists at a point, but the function is either undefined or has a different value at that point.

Removable Discontinuity

Image courtesy of LibreTexts Mathematics

In this graph, the limit as xxx approaches aaa ...

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Question 1 of 10

Which of the following best describes a removable discontinuity? 🤔

A point where the function is undefined and the limit does not exist

A point where the function has a sudden jump in value

A point where the limit exists, but the function is either undefined or has a different value

A point where the function approaches infinity