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Is \(-\frac{2}{3}x^3+4\) a polynomial?

Answer and explanation

Correct answer: Yes, because its coefficients are real numbers and the exponent of \(x\) is a non-negative integer.

Yes, \(-\frac{2}{3}x^3+4\) is a polynomial. The coefficients of a polynomial may be any real numbers, including negative numbers and fractions. Also, the exponent of the variable must be a non-negative integer; here, the exponent of \(x\) is \(3\). A fractional coefficient is allowed, whereas a fractional exponent such as \(x^{1/2}\) is not allowed in a polynomial. Exam tip: check the exponents, not the form of the coefficients—exponents must be \(0,1,2,\ldots\).

Related tags

PolynomialsDefinition Of PolynomialReal CoefficientsNon-Negative Integer ExponentsClass 9 MathematicsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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