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If the degree of (x^6+ax^2+5) is (6), what is the correct statement about (a)?

Answer and explanation

Correct answer: (a) can be any real number

The degree depends on the highest power that has a non-zero coefficient. In x^6+ax^2+5, the coefficient of x^6 is fixed at 1. Since this coefficient cannot be zero, the sixth-degree term remains present for every real value of a. The coefficient a belongs only to the lower-power x^2 term and cannot change the leading degree.

If a=0, the expression is x^6+5, which still has degree 6. If a is non-zero, an x^2 term is added, but it is still lower than x^6. Thus all real values of a produce a polynomial of degree 6. Option A is correct. There is no need for a to equal 6, and the condition a≠0 is too strong because a=0 also satisfies the requirement.

Related tags

PolynomialParameterDegree

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