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If \(r\neq0\), what will be the degree of \(rx^7+3x^2-10\)?

Answer and explanation

Correct answer: 7

The degree of a polynomial is the greatest exponent of the variable with a non-zero coefficient. Since \(r\neq0\), the coefficient of \(rx^7\) is non-zero. Hence the highest power of \(x\) is \(7\), so the degree is \(7\). Although \(3x^2\) has exponent \(2\), it is not the highest exponent. Exam tip: For a polynomial involving a parameter, always check whether the coefficient of the highest-power term is zero.

Related tags

PolynomialsDegree Of PolynomialNonzero CoefficientAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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