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Which expression has coefficient 1/2 but is still a polynomial?

Answer and explanation

Correct answer: (1/2)x³ + 4x − 6

Option A is correct because a fractional coefficient is allowed in a polynomial. In (1/2)x³ + 4x − 6, the powers of x are 3, 1, and 0. Each exponent is a non-negative integer, so the expression is a polynomial, specifically a cubic polynomial. The coefficient 1/2 changes the numerical value of the term but does not affect the admissibility of its exponent. Option B contains x in the denominator and is equivalent to (1/2)x^(-1) + 4, which has a negative exponent. Option C contains the fractional exponent 1/2, and option D contains the negative exponent -2. Thus A alone satisfies the defining condition for a polynomial.

Related tags

Fractional-CoefficientPolynomial-DefinitionValid-ExponentsDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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