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Which expression is a polynomial with only odd powers along with a constant term?

Answer and explanation

Correct answer: \(x^5-2x^3+7x-4\)

In \(x^5-2x^3+7x-4\), the powers of \(x\) are \(5,3\), and \(1\), all of which are odd positive integers, and \(-4\) is a constant term. Therefore, it satisfies the given condition. Option B is also a polynomial, but it contains the even powers \(4\) and \(2\). Option C has a negative exponent, while option D has \(\sqrt{x}=x^{1/2}\), a fractional exponent, so neither is a polynomial. Exam tip: variable exponents in a polynomial must be non-negative integers.

Related tags

PolynomialsDefinition Of PolynomialOdd PowersConstant TermExponentsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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