Determinant question

1. Feb 25, 2009

kidsmoker

1. The problem statement, all variables and given/known data

Hi,
i'm trying to solve this problem:

http://img4.imageshack.us/img4/3876/53065718.jpg [Broken].[/URL]

3. The attempt at a solution

I have shown it for n=2 and n=3 then I was going to use induction to prove it for all n, but I can't seem to find a way to do it. Please help!

Thanks.

Last edited by a moderator: May 4, 2017
2. Feb 26, 2009

CompuChip

If you expand the determinant along the last column, then you will get terms of the form
$$a_i^n \begin{vmatrix} 1 & a_2 & a_2^2 & \cdots & a_2^{n-1} \\ 1 & a_3 & a_3^2 & \cdots & a_3^{n-1} \\ \vdots & \cdots & \cdots & \cdots & \cdots \\ 1 & a_{n} & a_n^2 & \cdots & a_n^{n-1} \\ \end{vmatrix}$$