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Which expression is not a polynomial in t because t is in the denominator?

Answer and explanation

Correct answer: 6 + 3/t

A polynomial in t is a sum of terms in which the exponent of t is a fixed non-negative integer: 0, 1, 2, 3, and so on. In option B, the term 3/t can be rewritten as 3t⁻¹. The exponent −1 is negative, so this term violates the defining rule for a polynomial. Therefore 6 + 3/t is not a polynomial, and option B is correct. The presence of a numerical fraction alone would not be a problem, because coefficients such as 1/2 are allowed. The problem specifically occurs because the variable t is in the denominator. Options A and D use only valid whole-number powers, while option C contains t⁰ = 1 and t¹, so it is also a polynomial.

Related tags

PolynomialVariable DenominatorNegative ExponentDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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