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Which expression is not a polynomial only because of the power?

Answer and explanation

Correct answer: \(x^{\frac{2}{3}}+1\)

In a polynomial, the exponent of each variable must be zero or a positive integer. In \(x^{\frac{2}{3}}+1\), the exponent of \(x\) is \(\frac{2}{3}\), which is fractional; therefore, it is not a polynomial. In the other options, the exponents of \(x\) are 2, 1, and 3, all of which are positive integers. Exam tip: An expression with a fractional or negative exponent of a variable is not a polynomial.

Related tags

PolynomialsDefinition Of PolynomialFractional ExponentNon-PolynomialClass 9 MathematicsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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