  The polynomial $X^{3}-X-1$ has a unique positive root known as plastic
number, which is denoted by $\rho$ and is approximately equal to $1.32471795$.
In this note we study the zeroes of the generalized polynomial
$X^{k}-\sum_{j=0}^{k-2}X^{j}$ for $k\geq 3$ and prove that its unique positive
root $\lambda_{k}$ tends to the golden ratio $\phi=\frac{1+\sqrt{5}}{2}$ as $k
\to \infty$. We also derive bounds on $\lambda_{k}$ in terms of Fibonacci
numbers.
