Limites

Considera a função $g$g tal que $g(x)=\dfrac{3x^3+12}{x^2-9x^7}$g, left parenthesis, x, right parenthesis, equals, start fraction, 3, x, cubed, plus, 12, divided by, x, squared, minus, 9, x, start superscript, 7, end superscript, end fraction.