高考数学一轮复习第七章不等式第3节二元一次不等式组与简单的线性规划市赛课公开课一等奖省名师优质课获奖.pptx

1/85,2/85,3/85,Ax,By,C,0,4/85,平面区域,虚线,实线,交集,公共部分,5/85,不等式,(,组,),一次,解析式,6/85,一次,(,x,，,y,),集合,最大值,最小值,最大值,最小值,7/85,8/85,9/85,10/85,11/85,12/85,13/85,14/85,15/85,16/85,17/85,18/85,19/85,20/85,21/85,22/85,23/85,24/85,25/85,26/85,27/85,28/85,29/85,30/85,31/85,32/85,33/85,34/85,35/85,36/85,37/85,38/85,39/85,40/85,41/85,42/85,43/85,44/85,45/85,46/85,47/85,48/85,49/85,50/85,51/85,52/85,53/85,54/85,55/85,56/85,57/85,58/85,59/85,60/85,61/85,62/85,63/85,64/85,65/85,66/85,67/85,68/85,方法技巧,1.平面区域画法：线定界、点定域(注意实虚线),2要注意分析目标函数几何意义：当目标函数形式为zaxby时，其几何意义与直线在y轴上截距相关；当目标函数形式为z 时，其几何意义为可行域内点P(x，y)与点Q(a，b)连线斜率；当目标函数形式为z 时，其几何意义为可行域内点P(x，y)与点Q(a，b)之间距离,3在求目标函数最值时，当确定平移方向后，还要注意目标函数所在直线斜率与可行域边界直线斜率之间大小关系，只有这么才能找到最优解线性目标函数最值普通在可行域顶点或边界上取得.,69/85,70/85,71/85,72/85,73/85,74/85,75/85,76/85,77/85,78/85,79/85,80/85,81/85,82/85,83/85,84/85,85/85,