Help!! System of equations! For a natural number define the n*n matrix A = (aij) by setting aij = min(i,j). Write down the matrix a for a few values of n = 2,3,4...... Show that A is invertible and find its inverse. Hence or otherwise show that the system of equations Ax =b , where x=(x1,....xn) and b=(b1.....bn) has a unique solution. Anyone help with how to solve that? Thanks Rob and Joanna!