\(\underrightarrow{x~\hbox{approaches 0 from the left}}\) \(\underleftarrow{x~\hbox{approaches 0 from the right}}\)
\(x\) \(-\dfrac{1}{10}\) \(-\dfrac{1}{100}\) \(-\dfrac{1}{1000}\) \(-\dfrac{1}{10{,}000}\) \(\rightarrow\) 0 \(\leftarrow\) \(\dfrac{1}{10}\) \(\dfrac{1}{100}\) \(\dfrac{1}{1000}\) \(\dfrac{1}{10,000}\)
\(f(x) =\sin \dfrac{\pi }{x^{2}}\) 0 0 0 0 \(f(x)\) approaches 0 0 0 0 0