Which of the following expressions is a polynomial in the variable ?

MATHEMATICS · Single correct · CBSE · Mathematics · Polynomials · Polynomials

Problem

Which of the following expressions is a polynomial in the variable xx? (a) 3x−2+73x^{-2}+7 (b) 2x+x\dfrac{2}{\sqrt{x}}+x (c) 5x3+4x2−x+85x^{3}+4x^{2}-x+8 (d) x2+3x+1x^{2}+3\sqrt{x}+1

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