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已知函数eqIdc6eedb11a5894b2b958eb55cf3fc7e5c为奇函数,函数eqIdfc650470506c46bd87df551513b50079.
(1)求函数eqId4837c94ef0ff4dcf9b1dda4df363275a的定义域;
(2)当eqId2910a4444df1454183deac7f758d4dc1时,关于eqIda9cd3f94eb8045438f75e9daccfa7200的不等式eqIdf2ee229036c94346a37d66853cded2f6恒成立,求eqIdaea992e70d4943e49e893817eb885ed7的取值范围.
若函数eqIda0ceb5030946484abb2d5ebb68bd22a9且满足对任意的实数eqId70c08d40596445378a3ebc3942e99852都有eqId239506325b9945d782c2230d05c10373成立,则实数eqId70a27b6ddf6b478285353abb3b1f3741的取值范围是(   )
A.eqId34597ea26d7b4850afa92320e7136a1bB.eqIdbd78a4b3f979429eba4cb722cbd78a19C.eqIdfed090d5da404b708fcc8b680ffb3374D.eqId3d52626aad4d464783db6c9ace0b812b
已知集合eqIdc8102638370647818005805411daa5c0eqId5538879667f3469ca910874566e42ca7关系的韦恩图如下,则阴影部分所表示的集合为(   )
说明: figure
A.eqIdfebf52c45d75406e90fc3dfb1977d03fB.eqId0b9aa6d0e0bb4d60b695ab5e9156fec5C.eqIdae83356bac4a4430910bb49b99546fedD.eqId1da2af40ec7c4778b5d53dc8c7f806a0
已知幂函数eqId4837c94ef0ff4dcf9b1dda4df363275a的图像经过点eqId60873f7578974733b715e7122adab8fd,则eqId2572ba99435645ad86330d89061cd3a3______.
已知eqId93df3bf198b14746be2743456f9cc00beqId523f1d8bd682498a9b84c4784d1b0759eqId8d984f678189420192dc00f928cce578,则eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1的大小关系是(   )
A.eqIdde23c9bee5f2497a98f967afa9b73a7aB.eqId0d0cc8a6003c4e21bacd608a53c711cfC.eqId2cf6c501fcaf451c89bbbe8a7b5da7adD.eqId98df60d61acf40a38ea6e88af8316379
同步
如图,一个湖的边界是圆心为O的圆,湖的一侧有一条直线型公路l,湖上有桥ABAB是圆O的直径).规划在公路l上选两个点PQ,并修建两段直线型道路PBQA.规划要求:线段PBQA上的所有点到点O的距离均不小于圆O的半径.已知点AB到直线l的距离分别为ACBDCD为垂足),测得AB=10,AC=6,BD=12(单位:百米).
说明: figure
(1)若道路PB与桥AB垂直,求道路PB的长;
(2)在规划要求下,PQ中能否有一个点选在D处?并说明理由;
(3)对规划要求下,若道路PBQA的长度均为d(单位:百米).求当d最小时,PQ两点间的距离.
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