Q

# Is the following expression polynomial in one variable? State reasons for your answer. (iv) y + 2 / y

1.(iii)  Is the following expression polynomial in one variable? State reasons for your answer.

(iv)    $y + \frac{2}{y}$

Because we can observe that the exponent of variable y in term $\dpi{100} \frac{2}{y}$ is $-1$ which is not a whole number. Therefore this expression is not a polynomial.