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If (n) is a non-negative integer and the degree of (x^{n+2}+x^5+1) is (5), which condition is correct for (n)?

Answer and explanation

Correct answer: \(n\leq 3\)

The degree of a polynomial is its greatest exponent with a non-zero coefficient. Here the exponents are \(n+2\), \(5\), and \(0\). For the degree to remain \(5\), \(n+2\) must not exceed \(5\); hence \(n+2\leq 5\), or \(n\leq 3\). Although \(n=0\) is one possible value, it is not the complete condition. Exam tip: In degree questions, compare the exponents of all terms and identify the greatest one.

Related tags

PolynomialsDegree Of PolynomialExponentsInequalitiesClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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