Consider the equation log(3x – 1) = log(28). Explain why …

Mathematics Questions

Consider the equation log(3x – 1) = log28. Explain why 3x – 1 is not equal to 8. Describe the steps you would take to solve the equation, and state what 3x – 1 is equal to

Short Answer

To solve the equation log(3x – 1) = log‚ÄöCC(8), first recognize that the logarithms have different bases. Then, use the change of base formula to express both sides in the same base, leading to the equation 3x – 1 = log(8) / log(2), which allows you to isolate x for further simplification.

Step-by-Step Solution

Step 1: Understand the Equation

Start with the equation: log(3x – 1) = log2(8). This equality involves logarithms with different bases, which means they cannot be directly compared as they are. Recognizing that both sides must equal the same value is crucial for solving the equation.

Step 2: Change the Base

To solve for 3x – 1, convert the base of the logarithm on the right side. Use the change of base formula: log2(8) = log(8) / log(2). This allows for both sides of the equation to be expressed using the same base, making it easier to compare.

Step 3: Rewrite the Equation

Now rewrite the original equation using the new expression: 3x – 1 = log(8) / log(2). This shows that 3x – 1 is equal to the value of the right-hand side. From here, you can solve for x by isolating it and simplifying the equation further.

Related Concepts

Logarithm

A mathematical function that represents the exponent or power to which a base must be raised to obtain a given number.

Change Of Base Formula

A formula that allows a logarithm with one base to be expressed in terms of logarithms with another base, usually defined as log_b(a) = log_k(a) / log_k(b).

Isolation Of Variables

A method in algebra used to solve equations by isolating a variable on one side of the equation to find its value.

Scroll to Top