How to solve a logarithmic equation with extraneous solution, ln(3x-2)+ln(x-1)=2ln(x)

How to solve a logarithmic equation with extraneous solution, ln(3x-2)+ln(x-1)=2ln(x)

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial covers logarithmic expressions, solving logarithmic equations using the power rule, and the importance of factoring in quadratic equations. It emphasizes the need to check solutions for domain restrictions, particularly in logarithms, to avoid extraneous solutions. The tutorial also highlights the significance of understanding domain restrictions in logarithmic functions and the necessity of verifying solutions to ensure they fit within the domain.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result when you apply the power rule to a logarithmic expression?

The logarithm is added to the exponent

The base of the logarithm changes

The exponent is multiplied by the logarithm

The logarithm is divided by the exponent

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When two logarithmic expressions are equal, what can you do with their arguments?

Multiply them

Subtract one from the other

Set them equal to each other

Add them together

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving a quadratic equation?

Multiply all terms by two

Divide by the highest power of x

Add the coefficients

Set the equation equal to zero

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why might you use the quadratic formula instead of factoring?

It is more accurate

It works for all quadratic equations

It avoids complex numbers

It is faster

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the zero product property used for?

To multiply two numbers

To divide a polynomial

To find the roots of a quadratic equation

To simplify logarithmic expressions

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What must you check when you find solutions to a logarithmic equation?

If the solutions are even numbers

If the solutions are positive

If the solutions fit the domain restrictions

If the solutions are integers

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can't you take the logarithm of a negative number?

Because it is always positive

Because it is undefined in the real number system

Because it is always zero

Because it results in a complex number