Pregunta: limx→∞7x+810x2-8x+9=810limx→-∞7x+810x2-8x+9=810

Divide the numerator and denominator by the highest power of $\mathrm{x}$ in the denominator, which is ${\mathrm{x}}^2$ .

$\underset{\mathrm{x}\to \mathrm{\infty }}{lim}\left(\frac{\frac{7\mathrm{x}}{{\mathrm{x}}^2}+\frac{8}{{\mathrm{x}}^2}}{\frac{10{\mathrm{x}}^2}{{\mathrm{x}}^2}+\frac{-8\mathrm{x}}{{\mathrm{x}}^2}+\frac{9}{{\mathrm{x}}^2}}\right)=\frac{8}{10}$

Evaluat...