Code:
\[ c=\left|\begin{array}[c]{cccc}1 & 1 &\ldots & 1\\ a_{1}& a_{2}&\ldots & a_{n-1}\\ a_{1}^{2}& a_{2}^{2}&\ldots & a_{n-1}^{2}\\ \vdots & & &\\ a_{1}^{n-2}& a_{2}^{n-2}&\ldots & a_{n-1}^{n-2}\end{array}\right| =D_{n-1}. \]
Code:
\[ c=\left|\begin{array}[c]{cccc}1 & 1 &\ldots & 1\\ a_{1}& a_{2}&\ldots & a_{n-1}\\ a_{1}^{2}& a_{2}^{2}&\ldots & a_{n-1}^{2}\\ \vdots & & &\\ a_{1}^{n-2}& a_{2}^{n-2}&\ldots & a_{n-1}^{n-2}\end{array}\right| =D_{n-1}. \]
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