Question

Write an expression which is not a polynomial.
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Answer 1

Answer:

$\frac{1}{ {x}^{3} } + {x}^{2} + x + 7$

Step-by-step explanation:

There, you see, there is x³ in the denominator. So, it is not a polynomial.

Whenever, there is an unknown variable in the denominator, the equation does not become a polynomial.