Question

Question #01422

Answer 1

`nabla xx A = det ((hat x, hat y, hat z),(partial_x, partial_y, partial_z),(x + 2y + az, bx - 3y - z, 4x + cy + 2z))`

`= hat x(c+1) - hat y (4-a) + hat z (b-2) = 0`

`implies a,b,c = 4, 2, -1`