ANSWER
A. 1
D. 8
Step-by-step explanation
The vertical asymptote occurs at where the denominator of a rational function in its simplest form is equal to zero.
The rational function given is
![p(x) = (9)/((x - 1)(x - 8))](https://img.qammunity.org/2020/formulas/mathematics/middle-school/v9to4f3hj7ae3lt0awyq09ek8ke2b1y9bc.png)
This rational function is in it's simplest form.
The vertical asymptotes occurs at
![(x - 1)(x - 8) = 0](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9kz8rz1f8m2vjrryxfybsb08p0acwpro9c.png)
By the zero product principle, we must have either
![(x - 1) = 0 \: \: or \: \: (x - 8) = 0](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3s82qdgcxvf2y2bbsznyqh58u270o2syze.png)
This implies that
![x =1\: \: or \: \: x = 8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/amf27a7hmt78jsjkjsyfosftamrc8q82rv.png)
Options A and D are correct.