To solve the expression \(2\log\left(\frac{1}{8}\right) + 3\log\left(\frac{1}{9}\right) + 5\log\left(\frac{1}{125}\right)\), let's break it down step by step.

### Step 1: Use the logarithm power rule
The power rule of logarithms states that \(a\log(b) = \log(b^a)\). Applying this rule:

\[
2\log\left(\frac{1}{8}\right) = \log\left(\left(\frac{1}{8}\right)^2\right)
\]
\[
3\log\left(\frac{1}{9}\right) = \log\left(\left(\frac{1}{9}\right)^3\right)
\]
\[
5\log\left(\frac{1}{125}\right) = \log\left(\left(\frac{1}{125}\right)^5\right)
\]

### Step 2: Simplify the exponents
Now, calculate the values:

\[
\left(\frac{1}{8}\right)^2 = \frac{1}{64}
\]
\[
\left(\frac{1}{9}\right)^3 = \frac{1}{729}
\]
\[
\left(\frac{1}{125}\right)^5 = \frac{1}{3125^2} = \frac{1}{9765625}
\]

So, the expression becomes:

\[
\log\left(\frac{1}{64}\right) + \log\left(\frac{1}{729}\right) + \log\left(\frac{1}{9765625}\right)
\]

### Step 3: Use the logarithm addition rule
The addition rule for logarithms states that \(\log(a) + \log(b) = \log(a \times b)\). Thus, we have:

\[
\log\left(\frac{1}{64} \times \frac{1}{729} \times \frac{1}{9765625}\right)
\]

### Step 4: Multiply the fractions
Multiplying the fractions:

\[
\frac{1}{64} \times \frac{1}{729} \times \frac{1}{9765625} = \frac{1}{64 \times 729 \times 9765625}
\]

Calculate the product:

\[
64 \times 729 = 46656
\]
\[
46656 \times 9765625 = 455803596875
\]

Thus:

\[
\frac{1}{455803596875}
\]

The expression becomes:

\[
\log\left(\frac{1}{455803596875}\right)
\]

### Step 5: Simplify using properties of logarithms
\[
\log\left(\frac{1}{x}\right) = -\log(x)
\]

So:

\[
\log\left(\frac{1}{455803596875}\right) = -\log\left(455803596875\right)
\]

Thus, the final result is:

\[
-\log\left(455803596875\right)
\]

This is the simplified answer.

Would you like more details or have any questions?

---

Here are 8 questions to explore this topic further:

1. How can you use the change of base formula with logarithms?
2. What is the significance of the logarithm power rule in solving equations?
3. How can the logarithm product rule be applied to simplify expressions?
4. What are some practical applications of logarithms in real-world scenarios?
5. How do different logarithmic bases affect the calculation process?
6. Can you explain the relationship between logarithms and exponents in detail?
7. How do logarithms help in solving exponential equations?
8. What are the common logarithmic identities that are useful in algebra?

**Tip:** When dealing with logarithms, always remember the key properties such as the product, quotient, and power rules, as they simplify complex expressions significantly.

Learn how to solve the logarithmic expression 2log(1/8) + 3log(1/9) + 5log(1/125) step-by-step with detailed explanations of logarithmic rules and properties. Suitable for Grades 10-12.

Math Problem Statement

Solution

Ask a new question for Free

By Image

Math Problem Analysis

Mathematical Concepts

Formulas

Theorems

Suitable Grade Level

Related Recommendation