So infinity is kind of a strange number. You can't just plug in infinity and see what happens. But if you wanted to evaluate this limit, what you might try to do is just evaluate, if you want to find the limit as this numerator approaches infinity, you put in really large numbers there, you're going to see that it approaches infinity, that the numerator approaches infinity as x approaches infinity. And if you put really large numbers in the denominator, you're going to see that that also, well, not quite infinity, 3x squared will approach infinity, but we're subtracting it. So if you subtract infinity from some non-infinite number, this is going to be negative infinity. So if you were to just kind of evaluate it at infinity, the numerator, you would get positive infinity, the denominator, you would get negative infinity. And that's one of the indeterminate forms that L'Hopital's Rule can be applied to.