Logarithmic Equation 3D4F6A
1. **State the problem:** Solve the equation $$\sqrt{7} \cdot \frac{\log n}{\log 2} - \frac{\log 2n}{\log 2} = 1$$ for $n$.
2. **Recall logarithm properties:**
- $\log(ab) = \log a + \log b$
- $\frac{\log a}{\log b} = \log_b a$ (change of base formula)
3. **Rewrite the equation using these properties:**
$$\sqrt{7} \cdot \log_2 n - \log_2 (2n) = 1$$
4. **Expand $\log_2 (2n)$:**
$$\log_2 2 + \log_2 n = 1 + \log_2 n$$
5. **Substitute back:**
$$\sqrt{7} \cdot \log_2 n - (1 + \log_2 n) = 1$$
6. **Distribute and group like terms:**
$$\sqrt{7} \log_2 n - 1 - \log_2 n = 1$$
7. **Combine $\log_2 n$ terms:**
$$(\sqrt{7} - 1) \log_2 n - 1 = 1$$
8. **Isolate $\log_2 n$:**
$$(\sqrt{7} - 1) \log_2 n = 2$$
9. **Solve for $\log_2 n$:**
$$\log_2 n = \frac{2}{\sqrt{7} - 1}$$
10. **Rationalize the denominator:**
$$\log_2 n = \frac{2}{\sqrt{7} - 1} \cdot \frac{\sqrt{7} + 1}{\sqrt{7} + 1} = \frac{2(\sqrt{7} + 1)}{7 - 1} = \frac{2(\sqrt{7} + 1)}{6} = \frac{\sqrt{7} + 1}{3}$$
11. **Rewrite in exponential form to solve for $n$:**
$$n = 2^{\frac{\sqrt{7} + 1}{3}}$$
**Final answer:**
$$\boxed{n = 2^{\frac{\sqrt{7} + 1}{3}}}$$