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Which statement about the degree of the zero polynomial (p(x)=0) is correct?

Answer and explanation

Correct answer: Degree is not defined

The degree is defined as the greatest exponent of the variable in a non-zero polynomial. A non-zero constant, such as \(7\), has degree \(0\), because it can be written as \(7x^0\). The zero polynomial is different: every coefficient is zero, so there is no highest power with a non-zero coefficient. Consequently, its degree is not defined in the usual school-level definition.

For \(p(x)=0\), there is no term such as \(ax^n\) with \(a\neq0\) from which a greatest exponent can be selected. Calling its degree \(0\) would incorrectly confuse it with a non-zero constant polynomial. Therefore the mathematically appropriate statement is that the degree of the zero polynomial is not defined. Hence option C is correct.

Related tags

Definition-PolynomialZero-PolynomialUndefined-Degree

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