When x→ infinity, the numerator and denominator are the same, that is, the ratio of its coefficients is 1.

1 -5 times or 1? ...

Aiming at the infinite limit of fractional form, the coefficient ratio before denominator is discussed when the degree relation of X in denominator is the same.

When the order of the molecule x is higher than the denominator x, the order limit is infinite.

When the order of the molecule x is lower than the denominator x, the order limit is 0.