Solving Logarithmic and Exponential Functions

The video tutorial introduces logarithms and exponentials, explaining their definitions and properties. It provides examples of solving logarithmic equations, including cases with no solution and those involving natural logarithms. The tutorial emphasizes the importance of positive inputs for logarithms and concludes with a practice question for viewers.

What is the primary use of logarithms in scientific measurements?

• To determine temperature

• To count molecules

• To measure time

• To calculate speed

What must be true about the base in a logarithmic function?

• It must be a negative number

• It must be zero

• It must be a positive number not equal to one

• It must be one

In the conversion from logarithmic to exponential form, what does the base of the logarithm become in the exponential form?

• The exponent

• The base

• The coefficient

• The constant term

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CCSS.HSF.BF.B.5

How do you verify a solution in logarithmic equations?

• Divide by the logarithm

• Multiply by the base

• Substitute back into the original equation

• Add the exponent

What is the result of the equation 2x - 3 = 81 solved for x?

• x = 41

• x = 39

• x = 40

• x = 42

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CCSS.7.EE.B.4A

What happens when both sides of a logarithmic equation have the same base?

• You divide one side by the other

• You subtract the bases

• You multiply both sides by the base

• You can equate and solve the inputs directly

What does the equation x - 4x = -3 simplify to?

• x = 0

• x = -1

• x = 3

• x = 1

Tags

CCSS.8.EE.C.7B

What is the result when the inputs of both sides of a logarithmic equation are negative?

• Infinite solutions

• No solution

• One solution

• Cannot be determined

What is the correct solution for the equation involving e and the natural log, where the input must be positive?

• x = 0

• x = 1

• x = 1/2

• x = -1

What error is commonly made when solving exponential equations involving natural logs?

• Applying the wrong base

• Ignoring the requirement for positive inputs

• Forgetting to apply the power rule

• Miscalculating the square root