Example 4. Write a one-to-one mapping from $(-1,10)$ to $(-\infty, 2)$.
From conclusion (ii): $\mathrm{y}=\frac{11}{\mathrm{x}+1}-3$ is a one-to-one mapping from $(-1,10)$ to $(-2, \infty)$. From the two $y=-\left(\frac{11}{x+1}-3\right)$, i.e., $y=\frac{-11}{x+1}+3$ is a one-to-one mapping from $(-1,10)$ to $(-\infty, 2)$.