Connecting Infinite Limits and Vertical Asymptotes Practice Test

For $f(x)=\dfrac{3}{x-2}$, which limit notation represents the behavior of $f(x)$ as $x$ approaches $2$ from the right?

Let $u(x)=\dfrac{-1}{(x-1)^2}$. Which limit notation represents the behavior as $x\to 1$?