If you have something like , then you have to keep in mind that since division by zero is undefined. If you have something like , then you have to keep in mind that since you cannot take the square root of a negative number. If you have something like or , then you have to keep in mind that since you cannot take the log of zero or a negative number. These are examples of restrictions of the domain.
Since the function does not have a division by x, a square root, or a logarithm function, this means we don't have to worry about domain restrictions.
Also, notice if we graph the function, we can see that there are no domain restrictions:
Graph of
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Answer:
So the domain is the set of all real numbers. In other words, t can be any real number.