全导数:设z=arctan(xy),而y=e*x次方,求dz/dx设z=arctan(xy),而y=e*x次方,求dz/dx,

x��)�{ں���=Ϧn�z�n_�mbQrIb�FE��΋��J�T��gk>��S��Ʀ�*�� "���$�n:X�V��������S�*4��`�Ն�ц�a���#��Z-W��V��`���/.H̳�z�́k��
R[�g���Q�]Q��U
��Ԁ� T�d� �