\[y = - \frac{42}{x}:\]
\[значение\ аргумента,\ \]
\[при\ котором\ значение\ \]
\[функции\ равно\ 14;\ - 12;\ \]
\[60.\]
\[y = - \frac{42}{x} \Longrightarrow x = - \frac{42}{y}\]
\[y = 14 \Longrightarrow x = - \frac{42}{14} = - 3.\]
\[y = - 12 \Longrightarrow x = - \frac{42}{- 12} =\]
\[= \frac{7}{2} = 3,5.\]
\[y = 60 \Longrightarrow x = - \frac{42}{60} =\]
\[= - \frac{7}{10} = - 0,7.\]