Question

Write the value of $\underset{x\to 0^{-}}{\lim }\left[x\right].$

Answer 1

$$\begin{gathered} \underset{x\to 0^{-}}{\lim }\left[x\right] \\ \mathrm{If}x=0-h,\mathrm{then}h\to 0. \\ \underset{h\to 0}{\lim }\left[0-h\right] \\ =-1 \end{gathered}$$