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Which option correctly states the main condition of a polynomial?

Answer and explanation

Correct answer: Powers of the variable are zero or positive integers

The correct answer is B. The main condition for a polynomial in x is that each exponent of x must be a whole number that is zero or positive: 0, 1, 2, 3, and so on. Coefficients may be real numbers, but the variable cannot have a negative, fractional, or otherwise non-integer exponent. Option A is the opposite of the rule: negative powers such as x^{-1} are not allowed. Option B states the correct condition. Option C is wrong because a variable need not be in a denominator; in fact, a denominator containing x often gives a negative power. Option D is wrong because a power of 1/2 is fractional and represents a square-root type expression, not a polynomial power. Learn the rule before checking degree: valid exponents are non-negative integers.

Related tags

Definition-PolynomialConditionConcept

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