Which of the following is a polynomial

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x+1/x-1

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z³ + z

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Solution

The correct option is D
z³ + z

Hint : Degree of the polynomial should be non-negative intege Solution :

$\frac{z^{\frac{3}{2}}}{z^{\frac{1}{2}}}$ is $z^{(\frac{3}{2} - \frac{1}{2})}$ = z......and its degree is one , hence $z^{3} + z$ is a polynomial

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