C$)$

$\backslash$table$[[x,0\mathrm{.}25,0\mathrm{.}5,1,5,10,20,30,40,50],[\frac{1-3x^2}{x^2},13,1,-2,-2\mathrm{.}96,-2\mathrm{.}99,-2\mathrm{.}9975,-2\mathrm{.}9989,-2\mathrm{.}9994,-2\mathrm{.}9996]]$

$\underset{x}{lim}\frac{1-3x^2}{x^2}=$