发布时间 : 星期四 文章鏈鏂颁汉鏁欑増涓冨勾绾т笅鍐屾暟瀛?鏈熶腑鑰冭瘯鍗?鍚瓟妗? - 鐧惧害鏂囧簱更新完毕开始阅读9afb09cffd4ffe4733687e21af45b307e971f930
QOC//AB,
?四边形OAQP是长方形,
?OP?AQ
?t?8?2t,
?t?83
?当t值为83秒时,直线PQ//y轴;
②P?2,0?,Q?4,4?.
[提示]:QOA?4,OB?8,
?S四边形OABC?4?8?32
由运动知OP?t,BQ?2t,
?CP?OC?OP?8?t,AQ?AB?BQ?8?2t,
?S1四边形BCPQ?2?BQ?PC??OA?12?2t?8?t??4?2t?16,Q四边形BCPQ的面积是长方形OABC的面积的58
?2t?16?58?32?20,
?t?2, ?8?2t?4,
?P?2,0?,Q?4,4?.
9