If the equation $a_{n} x^{n}+a_{n-1} x^{n-1}+\ldots .+a_{1} x=0, a_{1} \neq 0, n \geq 2$ has a positive root $x=\alpha$, then the equation $n a_{n} x^{n-1}+(n-1) a_{n-1} x^{n-2}+\ldots .+a_{1}=0$ has a positive roots, which is

1) greater than $\alpha$

2) smaller than $\alpha$

3) greater than or equal to $\alpha$

4) equal to $\alpha$