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Which expression is not a polynomial because the variable has exponent 2/3?

Answer and explanation

Correct answer: x^(2/3) + 5

The expression x^(2/3) + 5 is not a polynomial in x because the exponent 2/3 is fractional. In a polynomial, the exponent of every variable must be a non-negative integer. The other choices have exponents 2, 1, and 3 respectively, with the constant terms understood to have exponent 0; therefore they satisfy the defining rule for polynomials.

Related tags

PolynomialFractional-ExponentDefinitionNon-PolynomialDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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