The problem is to solve the exponential equation $6^{2x} = 18$ for $x$.

AlgebraExponential EquationsLogarithmsEquation Solving
2025/5/4

1. Problem Description

The problem is to solve the exponential equation 62x=186^{2x} = 18 for xx.

2. Solution Steps

We can solve this exponential equation by taking the logarithm of both sides.
Using the natural logarithm (ln), we have:
ln(62x)=ln(18)ln(6^{2x}) = ln(18)
Using the logarithm power rule: ln(ab)=bln(a)ln(a^b) = b \cdot ln(a)
2xln(6)=ln(18)2x \cdot ln(6) = ln(18)
Now, we can solve for xx by dividing both sides by 2ln(6)2 \cdot ln(6):
x=ln(18)2ln(6)x = \frac{ln(18)}{2 \cdot ln(6)}
We can further simplify this expression:
ln(18)=ln(29)=ln(232)=ln(2)+ln(32)=ln(2)+2ln(3)ln(18) = ln(2 \cdot 9) = ln(2 \cdot 3^2) = ln(2) + ln(3^2) = ln(2) + 2 \cdot ln(3)
ln(6)=ln(23)=ln(2)+ln(3)ln(6) = ln(2 \cdot 3) = ln(2) + ln(3)
x=ln(2)+2ln(3)2(ln(2)+ln(3))x = \frac{ln(2) + 2 \cdot ln(3)}{2 \cdot (ln(2) + ln(3))}
Now, we can approximate the value of xx using a calculator:
ln(18)2.89037ln(18) \approx 2.89037
ln(6)1.79176ln(6) \approx 1.79176
x2.8903721.79176=2.890373.583520.8066x \approx \frac{2.89037}{2 \cdot 1.79176} = \frac{2.89037}{3.58352} \approx 0.8066
Let's leave the answer in terms of logarithms:
x=ln(18)2ln(6)x = \frac{ln(18)}{2ln(6)}

3. Final Answer

x=ln(18)2ln(6)x = \frac{ln(18)}{2ln(6)}

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