This is a question on Hankel determinant. Is there a closed form for determinant of the Hankel matrix of the sequence $\{1, a, a^2,\cdots, a^{2n+2}\}$?
determinant of a Hankel matrix
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matrices
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1Please post your second question as a new question. – 2011-11-24
1 Answers
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If I interpret your question correctly, then I suggest that you multiply the first row by $a$ and subtract it from the second row. The determinant of the resulting matrix should be easy to calculate.