1. **State the problem:** Solve the equation $$\frac{e^x - e^{-x}}{2} = 1$$ for $x$.
2. **Rewrite the equation:** Multiply both sides by 2 to clear the denominator:
$$e^x - e^{-x} = 2$$
3. **Substitute:** Let $u = e^x$. Then $e^{-x} = \frac{1}{u}$.
The equation becomes:
$$u - \frac{1}{u} = 2$$
4. **Clear the fraction:** Multiply both sides by $u$:
$$u^2 - 1 = 2u$$
5. **Rearrange into quadratic form:**
$$u^2 - 2u - 1 = 0$$
6. **Solve the quadratic equation:** Use the quadratic formula:
$$u = \frac{2 \pm \sqrt{(-2)^2 - 4 \cdot 1 \cdot (-1)}}{2} = \frac{2 \pm \sqrt{4 + 4}}{2} = \frac{2 \pm \sqrt{8}}{2} = \frac{2 \pm 2\sqrt{2}}{2} = 1 \pm \sqrt{2}$$
7. **Select valid solution:** Since $u = e^x > 0$, discard $1 - \sqrt{2}$ (negative). So:
$$e^x = 1 + \sqrt{2}$$
8. **Solve for $x$:** Take natural logarithm on both sides:
$$x = \ln(1 + \sqrt{2})$$
**Final answer:**
$$x = \ln(1 + \sqrt{2})$$
Solve Exponential 875423
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