中学学科网组卷网 教评网 学易书城
e卷通介绍 使用手册 收藏本站 有奖挑错建议
高中语文综合库
共计 123085道试题
+全部加入试卷
已知eqIdb7b2a563d46648468e03a50c4dec59ff
(1)已知关于eqId8e15963708e9415da25069fea5906e24的不等式eqIdb71bf7c427c249c888bbaab2857228b8有实数解,求eqId70a27b6ddf6b478285353abb3b1f3741的取值范围;
(2)求不等式eqIdce3ea59b8b2b4383a3c40c90fb61027a的解集.
更新:2019/11/19难度系数:0.65题型:解答题组卷:0次
在直角坐标系eqId2272a344734c4fb088737b84294f7219中,曲线eqId19a4eb16029e4550a14f2afe4741a3c3的参数方程为eqIdf00c7089721e4acbba2a6f0688e908fd (eqIdf9db0aee08264a238b9741675591065e为参数),直线eqId417e80f1349244878d01fe90e0891f5f的参数方程为eqId8d3e5f5b72a54c488e6185b47f563632eqId32454977564e4ee18da36bd51156c509为参数).
(1)求eqId19a4eb16029e4550a14f2afe4741a3c3eqId417e80f1349244878d01fe90e0891f5f的直角坐标方程;
(2)过曲线eqId19a4eb16029e4550a14f2afe4741a3c3上任意一点作eqIdd7be5abad1e34f6db17a56660de8d54feqId417e80f1349244878d01fe90e0891f5f垂直的直线,交eqId417e80f1349244878d01fe90e0891f5f于点eqIdcc614bd3390c4d028df189b234dcc351,求eqIdae95a83dfec74653b0ab1eece4588a9a的最大值.
更新:2019/11/19难度系数:0.65题型:解答题组卷:0次
某企业为确定下一年投入某种产品的研发费用,需了解年研发费用eqId8e15963708e9415da25069fea5906e24(单位:千万元)对年销售量eqId072d7d6b911b42bc89207e72515ebf5f(单位:千万件)的影响,统计了近eqId11f75c152f5341f39d020095cecda9b3年投入的年研发费用eqId05b272f4e71a4d64845b91331291e356与年销售量eqIdebb49e26f536440d8dc267ab472af40e的数据,得到散点图如图所示.
figure
(1)利用散点图判断eqId1e0899b84d704a2eb9332f22a4ca0c7aeqId59434a24f9ac499da1b79c2f4535db4c(其中eqId58b374fa0319432c9dd3742b02ed5a01均为大于eqIda86879ae304449a4a6e6461c485a1f13的常数)哪一个更适合作为年销售量eqId072d7d6b911b42bc89207e72515ebf5f和年研发费用eqId8e15963708e9415da25069fea5906e24的回归方程类型(只要给出判断即可,不必说明理由)
(2)对数据作出如下处理,令eqId4c7d80ab7cf44a15919e1ad8ac89a172,得到相关统计量的值如下表:根据第(1)问的判断结果及表中数据,求eqId072d7d6b911b42bc89207e72515ebf5f关于eqId8e15963708e9415da25069fea5906e24的回归方程;
eqId6ab8854456c9444d89d5cab64a5f12fc 
eqId697b21df7fd74f69b193ce913d78a4de
eqId6f97c06aa1804320bd79cdfd5110c1ce
eqId4de44866099f4ec38bbb5fb2ba85104f
15
15
28.25
56.5
 
(3)已知企业年利润eqId2cd9e2fe3d6540df9399dbefe49ada54(单位:千万元)与eqIdaecbf8f0b72241568d8cf64f326e50e0的关系为eqIddc3d9e2a647145c482cc1d624be02116(其中eqIdcc8be1aef4b44d32b4161e7276246b71),根据第(2)问的结果判断,要使得该企业下一年的年利润最大,预计下一年应投入多少研发费用?
附:对于一组数据eqIdb597339b8f614833af944502d78d8b86,其回归直线eqId33e6943640e44e829a4cba9a6424d6a0的斜率和截距的最小二乘估计分别为eqIdeb5ca5733d06437da33dd72e6ffe10aceqId4bd494957c97489480324cb6be1ca9cf
更新:2019/11/19难度系数:0.65题型:解答题组卷:0次
如图,在四棱锥eqIdb39a573a19664aed882659c5921d7eb1中,正方形eqId5122959e76284546b5f4610a8a02f714所在平面与正eqId64b9b599fdb6481e9f8d9a94c102300b所在平面垂直,eqId24c927bb1a094937b316c2657544199f分别为eqId67b9b46a6d7d4704914e0ada989f3e8a的中点,eqIdd5b10b2a13f148b78e0d5a1b820538fd在棱eqId34c6b6e427744abfb88dc90b8c7c2111上.
figure
(1)证明:eqIda1def6ea6ee046f283ff0b8a18656f92平面eqId076f835a1f2c428898c79204bd1d52fd
(2)已知eqIdb60bb1649c8b41cb935771acc097167e,点eqId2381423d4cd146cab95f55527681a766eqId211ab513a02842808eee31b029297b06的距离为eqIdb0e739c4c919442caf1ca2648e64c48f,求三棱锥eqId8970490ef740492295d08041928d4cb1的体积.
更新:2019/11/19难度系数:0.65题型:解答题组卷:0次
设正三棱锥eqId12175c05cfe240a0b8270ee03df1962f的高为eqId7412be7a456647e695421020b620936e,且此棱锥的内切球的半径eqId2afb79eb3d4f4786a7474dcd6407c4deeqId0965a5e8757f4460bf46755365b96c6eeqId7412be7a456647e695421020b620936e,则eqId31e343596d4441f0adf6951eb14db086=_______.
更新:2019/11/19难度系数:0.4题型:填空题组卷:0次
已知抛物线eqIda807245456b04e3397b6665c0a779287上一点eqId6ece499678e945138a93261255373de3到其焦点的距离为eqId327639a3ddcd43da929b4cb290f9ffa9,则eqId9db04da1451246d7980c2d731139a156___________.
更新:2019/11/19难度系数:0.85题型:填空题组卷:0次
已知eqId4837c94ef0ff4dcf9b1dda4df363275a为奇函数,当eqId26126945e23544d9b0cecaf9cf4809ac时,eqId943a627e918f40b7bb0ec4fc2e6db8df,则当eqId4db620a5946b4ee0a9f530f35a6d505a时,eqId4837c94ef0ff4dcf9b1dda4df363275a=_________.
更新:2019/11/19难度系数:0.94题型:填空题组卷:0次
若函数eqId55e4dd0e3dfb4ef6bdde92b632f25cfd恰有eqIdc052ddfbd4524f67a79e0e77c2e5656a个零点,则eqId70a27b6ddf6b478285353abb3b1f3741的取值范围为( )
A.eqId2cf78f1c6c2f408585ca294db13154d3B.eqIdd3b6c094ea6744da86cbfc0babbf5a7e
C.eqId79543128a9ed4f14b6ddfe3b0b042ac2D.eqIdf1c39193da1b4321adde8a8be0efd84b
更新:2019/11/19难度系数:0.65题型:单选题组卷:0次
eqId6a13e7b7d92849eba6c91758c54a673f,双曲线eqIdf989e9fede944af0b5eeb72b804b5c39eqId87c3be1adf9948c3a135e6988b48f00eeqIdbe6985b2abad43e4aa83053ed3a4c7caeqId61ab2f27c87f4c8cb1f097aeba9f9d34eqIdc95fcc3729b9489ca46a25eeb3777937与圆eqId5af04f31e0f94deab7dca7147247b6c3相切,eqIdcc614bd3390c4d028df189b234dcc351eqIdbe6985b2abad43e4aa83053ed3a4c7caeqIdcd9b24a6a6e5426ab775be20461174e3eqIda86879ae304449a4a6e6461c485a1f13),eqId8754ce8cf7f34f04abb9a0c041f57f5ceqIdcd9b24a6a6e5426ab775be20461174e3eqIda86879ae304449a4a6e6461c485a1f13),若圆eqId517584fed25c413ba8b7bb33ffa2d5c6上存在一点eqIdd7be5abad1e34f6db17a56660de8d54f满足eqId74cf9d07d86d4080a4007d62bc2a9bbe,则点eqIdd7be5abad1e34f6db17a56660de8d54feqId8e15963708e9415da25069fea5906e24轴的距离为( )
A.eqIdd9014531eb8f4ecfaa1496f0f3b63ac4B.eqId5222c2ea3b544c58bafb590c9238c493C.eqId67cbac5d90cc4e0b9f185919908346f6D.eqIdebd0a313a85a4ee58b1600df349aafd4
更新:2019/11/19难度系数:0.65题型:单选题组卷:0次
已知eqId9628cfb6c04a4410b3a54e78f759d5f9eqIde7050015d36147feaa8a4b80e682c258,则eqIde3adf51f42674398b03c2c6ac32a57f8( )
A.eqId6c134c414a5e4643849c88caa4d6a5f0B.eqId6c134c414a5e4643849c88caa4d6a5f0eqIdca7f979b4aed44608faf40debecd18b1C.eqIddda48cced83d424b89b7d8f8c62b1056D.eqIddda48cced83d424b89b7d8f8c62b1056eqIdca7f979b4aed44608faf40debecd18b1
更新:2019/11/19难度系数:0.85题型:单选题组卷:0次
关注官方微信