\(\underrightarrow{x~\hbox{approaches 0 from the left}}\)
\(\underleftarrow{x~\hbox{approaches 0 from the right}}\)
\(x\)
\(-0.1\)
\(-0.01\)
\(-0.001\)
\(\rightarrow \)
\(0\)
\(\leftarrow \)
\(0.001\)
\(0.01\)
0.1
\(f(x)=x^{2}+2\)