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设函数eqId931edac7c43b4bf386f82adc58d9bb23,其中eqId3a4208e0040c42ed8b09de2cae9d562eeqIdf458db68122849abb588feb2e682d9aceqIdc13953f2514e4c8f9c8aaaf5241c33aceqId4eb56f42ca674f2f9c9101b548763159为已知实常数,eqId6fc94f6e181444c6b809fb393eb8fae6,有下列四个命题:(1)若eqId2522ab43d44f4e37b2965dca59d9524c,则eqId41b30ba22d674be8a3af6ac82c8c363e对任意实数eqId8e15963708e9415da25069fea5906e24恒成立;(2)若eqId37c68120b2124eee9eee0d83cfc6c049,则函数eqId6f13759e937144069819aed2ae5a1057为奇函数;(3)若eqIdb34cc49e818d45488e1786735b31dc41,则函数eqId6f13759e937144069819aed2ae5a1057为偶函数;(4)当eqId2132770407e74fd0ad9285df31c55cf4时,若eqId381b08dd71d944ceba4969f14c6a9492,则eqId811d2414b47e4c879321ab10df8622a5eqId912eadc0a40c4262bbd82d2a8f4409b2);则上述命题中,正确的个数是(   )
A.1个B.2个C.3个D.4个
(1)解方程:eqId00470bc7180d4052a0c2dfa3ad8a2011
(2)用数学归纳法证明:eqId85dd4e26e11342c29250c69ee4ddf27b能被4整除;
eqId566109b7ce6e40bfa59efdfc06b40549”是“eqId2f8ff3f92adb47879d0d698d6fcafd4e”的(   )
A.充分非必要条件B.必要非充分条件
C.充要条件D.既非充分条件又非必要条件
难度: 0.94 | 2020·上海高一期末
eqId435784a5e33244d08e33884b88b8b35eeqId1122044571fd417eb8f558096bf28027,则eqId70c52126b23a4d5388d832c32cc794a4________(结果用反三角函数值表示).
难度: 0.65 | 2020·辽宁高一期中
方程eqIdfaf0fd22f0e846f8a3478b07ea56fa61eqId36d2c8e144e7416db53d289e6f25e680的解集为________(用反三角表示)
直线eqId6fc3a21fe3a44d06b32dfa3fdc7aa06f的倾斜角是(   ).
A.eqIda35adc4aac154f88ab65481b46f8310dB.eqIde3fdbf62e3b24c61b2bb1e712b115a71
C.eqIdc796197bd039426c89341f9a9a4c1d44D.eqId286e1db245be4346bc76ec6d2cecc0c8