Education Technology

What is Log?

Subject Area
Math: Algebra II: Logarithms and Exponentials
Math: AP Precalculus: Exponential and Logarithmic Functions
Math: Precalculus: Exponential and Logarithmic Functions
Level
9-12
Activity Time
45 Minutes
Software
TI-Nspire™ CX
TI-Nspire™ CX CAS
TI Calculator
TI-Nspire CX series
TI-Nspire Version
5.4
Resource Types
Lessons
Exam Prep
Format
TNS

What is Log?

Activity Overview

In this activity, students will solve simple logarithmic equations and verify solutions using the corresponding exponential equations.

Vocabulary

  • Exponential function
  • Logarithmic function
  • One-to-one function
  • Inverse function
  • Domain and range

About the Lesson

This lesson involves the one-to-one function f(x)=bx. In acknowledging the existence of its inverse, students will:

  • Use the domain and range of f(x) to determine the domain and range of f-1(x).
  • Interpret the graph of f-1(x) as the reflection of f(x) across the line y = x.
  • Use this inverse relationship to write an equation for the graph of the inverse.
  • Recognize the logarithmic notation needed to define the inverse function.
  • Use the inputs and outputs of two inverse functions to complete a table.

    As a result, students will:
  • Solve simple logarithmic equations and verify solutions using the corresponding exponential equations.

*Note: This activity contains an optional AP Practice Questions document for those students preparing for the AP Precalculus Exam.

Subject Area
Math: Algebra II: Logarithms and Exponentials
Math: AP Precalculus: Exponential and Logarithmic Functions
Math: Precalculus: Exponential and Logarithmic Functions
Level
9-12
Activity Time
45 Minutes
Software
TI-Nspire™ CX
TI-Nspire™ CX CAS
TI Calculator
TI-Nspire CX series
TI-Nspire Version
5.4
Resource Types
Lessons
Exam Prep
Format
TNS
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