1. Recall the definition of a polynomial:
A polynomial in one variable is an expression of the form , where is a non-negative integer () and are constants.
2. Analyze each function:
A.For :
The function is a logarithmic function. It is not in the form of with non-negative integer exponents of . So is not a polynomial.
B.For :
We can rewrite as . Since the exponent of is , which is a negative integer, it does not satisfy the condition that the exponents of in a polynomial must be non-negative integers. So