求u=x2+2y2+3z2+2xy-4x+2y-4z在点O(0 0 0) A(1 1 1) B(-1 -1 -1)处的梯度 并求梯度为零之点.
求u=x2+2y2+3z2+2xy-4x+2y-4z在点O(0 0 0) A(1 1 1) B(-1 -1 -1)处的梯度 并求梯度为零之点.
发布时间:2024-10-06 00:33:14
求u=x2+2y2+3z2+2xy-4x+2y-4z在点O(0 0 0) A(1 1 1) B(-1 -1 -1)处的梯度 并求梯度为零之点.