Exponential Equation C889E7
1. **State the problem:** Solve the exponential equation $$2^{2x+1} = 3^{x+1}$$.
2. **Recall the properties of exponents:** For any base $a > 0$, $a^{m+n} = a^m \cdot a^n$ and if $a^A = a^B$, then $A = B$ (only if bases are equal).
3. Since the bases 2 and 3 are different, we take the natural logarithm (ln) on both sides to solve for $x$:
$$\ln\left(2^{2x+1}\right) = \ln\left(3^{x+1}\right)$$
4. Use the logarithm power rule $\ln(a^b) = b \ln(a)$:
$$ (2x+1) \ln(2) = (x+1) \ln(3) $$
5. Distribute the logarithms:
$$ 2x \ln(2) + \ln(2) = x \ln(3) + \ln(3) $$
6. Group terms with $x$ on one side and constants on the other:
$$ 2x \ln(2) - x \ln(3) = \ln(3) - \ln(2) $$
7. Factor out $x$:
$$ x (2 \ln(2) - \ln(3)) = \ln(3) - \ln(2) $$
8. Solve for $x$:
$$ x = \frac{\ln(3) - \ln(2)}{2 \ln(2) - \ln(3)} $$
9. This is the exact solution. You can approximate numerically if needed.
**Final answer:**
$$ x = \frac{\ln(3) - \ln(2)}{2 \ln(2) - \ln(3)} $$