How to find the solutions when solving a logarithmic equation

How to find the solutions when solving a logarithmic equation

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial covers the process of condensing logarithms into a single expression, converting logarithmic equations to exponential form, and solving the resulting quadratic equations. It explains the use of the quadratic formula to find solutions and highlights the importance of checking for extraneous solutions, especially when dealing with logarithms.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of subtracting two logarithms with the same base?

Addition

Subtraction

Multiplication

Division

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can a logarithmic equation be converted to solve for the variable?

By factoring

By converting it to exponential form

By using the quadratic formula

By using trigonometric identities

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving a quadratic equation derived from a logarithmic expression?

Factor the equation

Convert to exponential form

Use the quadratic formula

Set the equation equal to zero

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method is used when a quadratic equation cannot be factored?

Substitution

Completing the square

Graphing

Using the quadratic formula

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should be done after solving a quadratic equation to ensure the solution is valid?

Check the solution in the original equation

Use a calculator to verify

Graph the solution

Re-solve using a different method

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an extraneous solution in the context of logarithms?

A solution that is negative

A solution that is complex

A solution that does not satisfy the original logarithmic equation

A solution that satisfies the equation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to verify solutions in logarithmic equations?

To check for calculation errors

To find additional solutions

To confirm the solution satisfies the original equation

To ensure the solution is positive