Which of the following is a polynomial?

Question:

Which of the following is a polynomial?

(a) $x^{-2}+x^{-1}+3$

(b) $x+x^{-1}+2$

(c) $x^{-1}$

(d) 0

 

Solution:

(d) 0

0 is a polynomial whose degree is not defined.

 

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