1. **State the problem:** Find the domain, vertical asymptote, and end behavior of the function $$h(x) = -\log(3x - 4) + 7$$.
2. **Domain:** The logarithm is defined only when its argument is positive:
$$3x - 4 > 0$$
Solve for $$x$$:
$$3x > 4$$
$$x > \frac{4}{3}$$
So, the domain in interval notation is:
$$(\frac{4}{3}, \infty)$$
3. **Vertical asymptote:** The vertical asymptote occurs where the argument of the logarithm is zero:
$$3x - 4 = 0$$
$$x = \frac{4}{3}$$
4. **End behavior:**
- As $$x \to \frac{4}{3}^+$$, the inside of the log approaches zero from the positive side, so $$\log(3x - 4) \to -\infty$$.
- Since $$h(x) = -\log(3x - 4) + 7$$, then
$$h(x) \to -(-\infty) + 7 = +\infty$$.
- As $$x \to \infty$$, $$3x - 4 \to \infty$$, so $$\log(3x - 4) \to \infty$$.
- Then,
$$h(x) = -\log(3x - 4) + 7 \to -\infty + 7 = -\infty$$.
5. **Summary:**
- Domain: $$(\frac{4}{3}, \infty)$$
- Vertical asymptote: $$x = \frac{4}{3}$$
- End behavior:
- As $$x \to \frac{4}{3}^+$$, $$h(x) \to +\infty$$
- As $$x \to \infty$$, $$h(x) \to -\infty$$
This matches the behavior of a reflected logarithmic function shifted up by 7.
Log Function Analysis 94D709
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