Evaluating a limit at infinity horizontal asymptote

The video tutorial explains how to evaluate limits by dividing each term by the variable with the highest power in the denominator. It demonstrates this method with an example, showing how as X approaches infinity, certain terms approach zero, simplifying the limit evaluation. The tutorial concludes with a key rule for handling limits involving variables raised to a power.

Explain the significance of the expression 2/1 in the context of the limit evaluation.

What rule is referenced regarding the division of a number by a variable raised to a power?