∵e^x-z+xy=3 ==>z=e^x+xy-3==>αz/αx│(2,1,0)=e²+1,αz/αy│(2,1,0)=2∴在点(2,1,0)处切平面的法向量是(e²+1,2,-1)故 所求切平面是(e²+1)(x-2)+2(y-1)-(z-0)=0,即(e²+1)x+2y-z=2(e²+2)...