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5.44.7  Vandermonde matrix : vandermonde

vandermonde takes as argument a vector whose components are denoted by xj for j=0..n−1.
vandermonde returns the corresponding Vandermonde matrix (the k-th row of the matrix is the vector whose components are xik for i=0..n−1 and k=0..n−1).
Warning !
The indices of the rows and columns begin at 0 with Xcas.
Input :


Output (if a is symbolic else purge(a)) :


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