we tried solving the matrix but got that the determinant would be equal to 1 + x₁ +…+xn
but when we try the this matrix:
{(1 + 1) 2 3}
{1 (2 + 1) 3}
{1 2 (3 + 1)}
the determinant of this isn’t equal to 1 + x₁ + … + xn
is there any specific way to solve this kind of matrix?