Solving Logarithmic Equations: A Mini-Lesson Overview

What is the primary purpose of using logarithms in solving exponential equations?

• To simplify multiplication

• To solve linear equations

• To rewrite exponential equations in a different form

• To find the base of an exponent

Which key on a TI-84 calculator allows you to change the base for logarithms?

• Log key

• Base key

• Alpha key

• Math key

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CCSS.HSF.BF.B.5

Why is the log key on a calculator typically limited to base 10?

• Because base 10 is the most commonly used base

• Because it simplifies calculations

• Because it is the default setting

• Because it is easier to program

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What is the change of base formula used for?

• To simplify multiplication

• To find the exponent in a logarithmic equation

• To solve logarithms with bases other than 10

• To convert logarithms to exponential form

How can you solve log base 3 of 110 if your calculator does not support different bases?

• By using the change of base formula

• By converting it to base 10

• By guessing the value

• By using the log key

What is the first step in solving an equation like 2^(k-4) = 6.7?

• Subtract 4 from both sides

• Convert it to logarithmic form

• Divide both sides by 2

• Multiply both sides by 2

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CCSS.HSF.BF.B.5

When solving logarithmic equations, why is it important to check for extraneous roots?

• Because they can lead to incorrect solutions

• Because they simplify the equation

• Because they are required for all logarithmic equations

• Because they are always correct

What does addition in logarithmic form typically mean?

• Subtraction

• Division

• Multiplication

• Exponentiation

In the equation log base 4 of (x^2) = 2, what is the value of x?

• 2

• 8

• 4

• 16

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CCSS.HSF.BF.B.5

Why is a negative number not a valid solution in logarithmic equations with positive bases?

• Because it is not required

• Because logarithms cannot have negative results

• Because it simplifies the equation

• Because it is always incorrect