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Which expression is a polynomial in (s) and has degree (1)?

Answer and explanation

Correct answer: \(9s+6\)

In \(9s+6\), the highest exponent of \(s\) is \(1\), so it is a linear polynomial. \(s^2-1\) is also a polynomial, but its degree is \(2\). \(s^{-1}+4\) has a negative exponent, while \(\sqrt{s}+3\) has \(s\) raised to \(\tfrac{1}{2}\); hence neither is a polynomial. Exam tip: exponents of variables in a polynomial must be non-negative integers such as \(0,1,2,\ldots\).

Related tags

PolynomialsLinear PolynomialDegree Of PolynomialAlgebraClass 9 MathematicsLinear PolynomialsIntroduction To PolynomialsMathematics

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