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Riya says that \(q(x)=\frac{4}{x}+2\) is a linear polynomial because \(x\) appears with exponent 1. Which observation correctly proves that her statement is wrong?

Answer and explanation

Correct answer: \(x\) is in the denominator, so it is not a polynomial.

A linear polynomial has the form \(ax+b\), where \(a\neq0\) and powers of \(x\) are non-negative integers. Here \(\frac{4}{x}=4x^{-1}\), so it is not a polynomial. Exam tip: if a variable is in the denominator, rewrite it using a negative exponent first.

Related tags

Linear PolynomialsPolynomial DefinitionNegative ExponentsAlgebra MisconceptionsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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