Unit 61: Exponential and Logarithmic Thinking

Day 21 of 30

Solving exponential equations using logs

11-12Mathematics

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Learning Objective

Students will solve exponential equations using logs through guided practice and application.

Today's Lesson

This lesson focuses on solving exponential equations using logs. Mathematics provides tools for modeling and analyzing complex systems.

An equation is a mathematical statement that says two expressions are equal. It always has an equals sign (=). For example: 5 + 3 = 8 or x + 4 = 10. When an equation has a variable (like x), solving it means finding what number makes both sides equal. Equations are like balanced scales—what you do to one side, you must do to the other to keep it balanced!

As you engage with this material, consider both the theoretical foundations and practical applications. Think critically about how this concept builds on prior knowledge and where you might apply it beyond the classroom.

Challenge yourself to go beyond memorization—seek to understand the "why" behind the processes and principles.

Key Terms
Problem

A mathematical question requiring analysis and solution

Solution

The result obtained by solving a problem

Activities
Instructions
1. Review the example problems for solving exponential equations using logs. 2. Identify the steps and strategies used. 3. Work through practice problems independently. 4. Compare solutions with a partner.
Materials Needed
  • Notebook
  • Calculator (if needed)
  • Graph paper
Practice Problems
1

Solve for x: x + 7 = 15

Hint: Subtract 7 from both sides.
2

Solve for y: 3y = 12

Hint: Divide both sides by 3.
3

If 2x - 5 = 9, what is x?

Hint: Add 5 to both sides, then divide by 2.

Teaching Tip

For advanced learners: Encourage deeper analysis and real-world connections. Consider extension activities that allow students to apply solving exponential equations using logs to novel situations.

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