1. **State the problem:**
We need to find a function of the form $f(x) = A \sec(Bx)$ that matches the given graph.
2. **Identify vertical asymptotes:**
The graph has vertical asymptotes at $x = \frac{\pi}{6}$ and $x = \frac{\pi}{2}$. For $f(x) = A \sec(Bx)$, vertical asymptotes occur where $\cos(Bx) = 0$.
3. **Find $B$ using asymptotes:**
The cosine function has zeros at $Bx = \frac{\pi}{2} + k\pi$, for integers $k$.
Given two consecutive asymptotes at $x = \frac{\pi}{6}$ and $x = \frac{\pi}{2}$, the distance between them is:
$$\frac{\pi}{2} - \frac{\pi}{6} = \frac{3\pi}{6} - \frac{\pi}{6} = \frac{2\pi}{6} = \frac{\pi}{3}$$
The period between zeros of cosine is $\frac{\pi}{B}$, so:
$$\frac{\pi}{B} = \frac{\pi}{3} \implies B = 3$$
4. **Find amplitude $A$ using maximum value:**
The graph peaks near $y = 6$ and dips near $y = -6$, so the amplitude $A = 6$.
5. **Write the function:**
$$f(x) = 6 \sec(3x)$$
6. **Summary:**
- Vertical asymptotes at $x = \frac{\pi}{6}, \frac{\pi}{2}$ imply $B=3$.
- Maximum and minimum values imply $A=6$.
**Final answer:**
$$f(x) = 6 \sec(3x)$$
Secant Function 9915Ed
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