设积分区域D由http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0c9ae1ed54164a58bd49dd327b8b9613.png和http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/106bacc400de4a258c3c2cc1e88f5e50.png围成，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/533bf3bfe8d7439fbe2689a974be1cf1.png（&nbsp; &nbsp; ）<br>

单击标准工具栏上的（ ）按钮可以打开“设计中心"面板。1、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7a8ef85e77f8490babf1302f6cfb317f.png &nbsp; &nbsp;&nbsp; 2、 http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/9cb75f8a10154a279078690a7149876e.png &nbsp; &nbsp;&nbsp; 3、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/451fea6688f4480fbf86d1a75006cfdc.png &nbsp; &nbsp;&nbsp; 4、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0eeb17dcbe1a455f84981040ae19ef0b.png

已知http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/4b2b0bc2a81c4059b4ee54fd2d4ca9b8.png，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/1bc083ffe16c4d17a12236cd29409de6.png(&nbsp; &nbsp; &nbsp; &nbsp; )<br>

设http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/90c19a717ac34717836dbca4afba1bd9.png是由方程http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7648e783c2f24044bb84346d0e07e161.png确定，求http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d24ed3aef9a94d38965289947da528f7.png（&nbsp; &nbsp; &nbsp;）

求函数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/c7a245151812467d85af7a1cf91a4be0.png在点http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/917120f5d9354f20ad871d7acfc759d1.png处全微分，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/63eafd5e56d84117ba59026b91c8059e.png（&nbsp;&nbsp;&nbsp;&nbsp;）<br>