Final answer:
The limit of f(x) as x approaches any value is the value itself.
The limit of g(x) as x approaches positive or negative infinity is positive or negative infinity respectively.
Step-by-step explanation:
To find the limits of the functions f(x) = 4 - x and g(x) = x^3, we need to evaluate the functions as x approaches certain values.
For f(x), as x approaches any value, the function 4 - x will approach that value as well.
Therefore, the limit of f(x) as x approaches any value is the value itself.
For g(x), as x approaches positive infinity or negative infinity, the function x^3 will also approach positive infinity or negative infinity respectively.
Therefore, the limit of g(x) as x approaches positive infinity or negative infinity is positive infinity or negative infinity respectively.