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Which conclusion is correct for x⁰ − √5x⁴ + 3x/8?

Answer and explanation

Correct answer: It is a polynomial and its degree is 4

The governing definition permits real coefficients, including irrational numbers such as √5 and rational fractions such as 3/8. It requires only that the powers of x be non-negative integers. In the expression, x⁰ is the constant 1, −√5x⁴ has power 4, and 3x/8 can be written as (3/8)x, whose power is 1. Every term therefore satisfies the polynomial rule, and the greatest power with a non-zero coefficient is 4. The expression is a polynomial of degree 4, so option B is correct. It is not the zero polynomial because its terms do not all vanish. Options A and D incorrectly treat allowable coefficients as forbidden; coefficients need not be integers for an expression to be a polynomial.

Related tags

Polynomial-DefinitionReal-CoefficientsDegreeDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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