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Which option states the definition of a polynomial most correctly?

Answer and explanation

Correct answer: Variable powers are zero or positive integers and coefficients may be real.

The governing definition is that a polynomial in a variable is a finite sum of terms whose variable exponents are non-negative integers: 0, 1, 2, and so on. Its coefficients may be real numbers, including integers, fractions, or irrational constants. Therefore option A gives the correct general condition. Option B is wrong because negative powers such as x⁻² represent a variable in the denominator. Option C is wrong because a variable under a root generally produces a fractional or otherwise non-permitted exponent, as in √x = x¹ᐟ². Option D is also wrong because a variable in the denominator gives a negative exponent. A polynomial may contain a constant term corresponding to exponent zero, but none of the other statements is required.

Related tags

Polynomial DefinitionNon-Negative ExponentsCoefficientsDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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