 is not a polynomial.
 is not a polynomial.
To determine if the expression 
 is a polynomial, let's analyze its structure.
 is a polynomial, let's analyze its structure.
A polynomial is an algebraic expression consisting of variables and coefficients, where the variables are raised to non-negative integer powers. The given expression is 
 .
.
However, the presence of the term 
 with a negative exponent makes this expression not a polynomial. In a polynomial, the exponents of the variables must be non-negative integers.
 with a negative exponent makes this expression not a polynomial. In a polynomial, the exponents of the variables must be non-negative integers.
Therefore, 
 is not a polynomial.
 is not a polynomial.