Final answer:
The limit as x tends to infinity of x^3, with another limit as the result approaches 3, is infinity.
Step-by-step explanation:
The given expression can be understood as the limit of a function, where the function has two limits applied to it. First, we take the limit as x tends to infinity of x^3, which is infinity, as the cube of any positive number grows without bound as the number gets larger. Next, we take the limit as the result from the previous step approaches 3. Since the result from the previous step is infinity, the limit as it approaches 3 is also infinity.