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{{ printedBook.courseTrack.name }} {{ printedBook.name }} To determine whether the given expression is a polynomial, recall that a polynomial is the sum of two or more monomials. A monomial is either a number, a variable, or an expression that is the product of one or more variables. Additionally, monomials can only have non-negative integer exponents. Consider the given expression.
$f(x)=2x_{3}+3x−x4 +7x_{5}−1 $
Since monomials **cannot** contain variables in the denominator, the third term in the above expression **is not** a monomial. Therefore, the given expression **is not** a polynomial.