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Which expression is not a polynomial because the variable has power \(\frac{3}{4}\)?

Answer and explanation

Correct answer: \(x^{\frac{3}{4}}+2\)

\(x^{\frac{3}{4}}+2\) is not a polynomial because the exponent of the variable \(x\) is \(\frac{3}{4}\), which is not a non-negative integer. In a polynomial, variable exponents can only be \(0,1,2,3,\dots\). In contrast, \(x^3+4\), \(4x^2+1\), and \(3x+4\) have exponents 3, 2, and 1 respectively, so they are polynomials. Exam tip: an expression containing a variable with a fractional exponent is not a polynomial.

Related tags

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

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