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已知eqId0ce93bfa1f6a4a23b3258410dd19847a为正实数.
(1)求证:eqId9032bed70e034873a8ba7d8af0402c3f
(2)求eqId8716964455d2477c9aac2ec2696e1991的最小值.
更新:2020/04/05 难度:0.65 题型:解答题 组卷:109
已知实数eqId2d569479cd1c43c1af15895792b64db6,eqId8ba9197540c04cb6a2805f8bc9ae3f1d,则“eqId84c0644b491c418abb1c361d6ff6a018”是“eqIdbf071f864a1c4703a6ec18f9869ce945”的(   )
A.充要条件B.必要不充分条件
C.充分不必要条件D.既不充分也不必要条件
更新:2020/04/02 难度:0.65 题型:单选题 组卷:291
已知三个正实数eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1满足eqId438c2edaa0634ec9b8ca35f5cfbc6755,给出以下几个结论:①eqId9fcfc9e57be1421fa9c9eba097b876e6;②eqId7f622d0b2270405982c3c352c7df912a;③eqId63d7430929744c65b5db0ffe028bd572;④eqId90f54481562943cdb371c44d2f5fd8fe.则正确的结论个数为(    )
A.1B.2C.3D.4
更新:2020/03/29 难度:0.65 题型:单选题 组卷:0
已知eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1为正数,且满足eqIdc8a813155b5e43f480561bf575acd943,证明:
(1)eqId535297b07b1248198b9e9d4f55fceb73
(2)eqId15bc813da35b48f09170db2bd300757b.
更新:2020/03/27 难度:0.65 题型:解答题 组卷:0
已知x,y>0,且xy=4,证明eqId8825d712062e4fc69bd4e967568dd782
更新:2020/03/27 难度:0.65 题型:解答题 组卷:0
选修4-5:不等式选讲
已知eqId5c6662e78d3f4b85ba40c2897dc3d823,求证:
(1)eqIdd886a9044bdd4c6ba00a597a4008eb13
(2)eqId1bd132f757d14de887176c874cd6e736.
更新:2020/03/25 难度:0.65 题型:解答题 组卷:279
已知正实数eqId0ce93bfa1f6a4a23b3258410dd19847a满足eqIda895823caae649fab9db775d656c7d9e,求证:eqId7b888d8fd7fa4cbe8ab94f80541c8967
更新:2020/03/23 难度:0.65 题型:解答题 组卷:8