Introduction to the concept of limits

Introduce limits through graphs, a table of values and worked algebraic examples. Students explore what a function approaches and compare numerical and analytical methods.
Grades
Grades 11–12
Pages
12
File type
Microsoft PowerPoint
Answer key
Included

Updated Sep 03, 2021

Subject
Math, Calculus
Topic
Limits, Direct substitution
Resource types
Presentations
Answer key
Included
Standards
HSA-SSE.A.2

Product description

From the author

PowerPoint presentation, 12 slides explaining the concept of limits and the steps to find the limit of a function through examples, both, numerically and analytically.

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Explain what it means for a function to have a limit as x approaches a given value

  • Estimate a limit numerically by completing a table of function values approaching a point from both sides

  • Find a limit analytically using direct substitution, then factoring and simplifying if the result is undefined

Teaching tips

  • Have students complete the blank table of values on their own calculators before revealing the completed table on the following slide, since the deck's own build separates the blank and completed versions

  • Work through the three analytical examples in order, since each introduces one more step of the three-step method than the last

  • Pair the third example's graph with a discussion of one-sided limits, since it is the deck's only example where the limit does not exist

Skills covered

  • Numerical limit estimation — students complete a table of function values on both sides of a point using a calculator and read off the limit.

  • Algebraic limit evaluation — students apply direct substitution and factoring to evaluate limits of rational functions.

  • Limit non-existence reasoning — students use one-sided behavior (approaching positive or negative infinity) to conclude when a limit does not exist.

Good to know

Questions teachers ask about this resource

Does the deck leave any problems for students to solve, or work through every example itself?

One activity is left for students to complete independently — a table of function values on slide 4 — before the deck reveals the completed version on the next slide; the three analytical examples are worked through step by step in the deck itself.

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Curriculum

Standards, concepts & topics

Standards

  • HSA-SSE.A.2

Core concepts

  • Limits of functions

  • One-sided limits

  • Continuity and discontinuity

  • Vertical asymptotes

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