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某单位决定投资3200元建一仓库(长方体状),高度恒定,它的后墙利用旧墙不花钱,正面用铁栅,每米长造价40元,两侧墙砌砖,每米长造价45元,顶部每平方米造价20元.
(1)设铁栅长为说明: figure米,一堵砖墙长为说明: figure米,求函数eqId144eff5c0e4649138a21f2b1b6a06907的解析式;
(2)为使仓库总面积说明: figure达到最大,正面铁栅应设计为多长?
函数eqIda658378e9ba74c7e881a0b6ef3110377的定义域为_________.
已知函数eqId4837c94ef0ff4dcf9b1dda4df363275aeqId7dcd2312d0bf4bb1befdfcc170e45791上的偶函数,当eqId26126945e23544d9b0cecaf9cf4809ac时,eqIdb291c88d968d467c9b6a4dcf83345fa0,则关于eqIda9cd3f94eb8045438f75e9daccfa7200的不等式eqIde602b75d5d7741d9bc1315efa672cbe7的解集为(   ).
A.eqIdf2c1156e836f4d7aad1d4f4a853ab61cB.eqId2dbb5631b2344f28a3635579b7213d03C.eqId9e13d10a0196459cb7f124af0a2c0b7aD.eqIdeb44d8fbc4154af4a4209f2f7d6f0da3
函数eqId4837c94ef0ff4dcf9b1dda4df363275aeqId28c4c21271884dfeac29ce0222782376分别是定义在eqId7dcd2312d0bf4bb1befdfcc170e45791上的偶函数、奇函数,且eqIdb6630e735cc44e05aebefb50d7f8c7cc,若存在eqId71b929dc73444b908fd0d819626dae50,使不等式eqIdb2fbb404628548858038231ac010aa4c成立,则实数eqIda4be99d332154d13a4a6ed1ff6444fe7的最小值为(   )
A.4B.eqId03859367a9b64a56ab90e31a0cec909aC.8D.eqId7634cee5da2e46908b3bfbffa6a111c0
已知函数eqId664c50bbf1204301b343f9c73f229665,下列是关于函数eqIda410f559e8e34dc4880864583a76e265的零点个数的判断,其中正确的是(   )
A.当eqId4f5682ff18d8421ab17ef168f54ca081时,有eqId8898c1dc81824f3098bbeae74e8f11fd个零点B.当eqId42ee0dcfc94b4789b338fa2d332af2ad时,有eqIdc052ddfbd4524f67a79e0e77c2e5656a个零点
C.当eqId4f5682ff18d8421ab17ef168f54ca081时,有eqIdddd35c5d043e4ebeac32a99367053c68个零点D.当eqId42ee0dcfc94b4789b338fa2d332af2ad时,有eqId37705e1ef6a84bbdbe88433e75932cdf个零点
已知奇函数eqId570b7fd6f7674306a0042d392a80263e满足eqId462501c0c19741a2b753c96d8e0d0a84,当eqIda6a63259310b4b2b943dd04e39d61c05时,eqId5afb5c29cf054b7c86ddfcac8c08d8f7,则eqIdc2d570ae8a654bba8c6398421ef406ad(   ).
A.eqIdfca343da1efc413487359c1551da9dbeB.eqIda86879ae304449a4a6e6461c485a1f13C.eqId37705e1ef6a84bbdbe88433e75932cdfD.eqIdc052ddfbd4524f67a79e0e77c2e5656a
已知函数eqId449445d809a44b31a12bb01f19f99272是定义在eqId7dcd2312d0bf4bb1befdfcc170e45791上的奇函数,且当eqId981680e62d3a427c9d237c5769d0f8a1时,eqIde2b47e0d260345d69407b70100b9f9ca.
(1)求函数eqId449445d809a44b31a12bb01f19f99272的解析式;
(2)若函数在eqIdfda23d2e204b4831ab1a91f50097f553上单调递增,求实数eqId70a27b6ddf6b478285353abb3b1f3741的取值范围.
根据定义,判断下列函数的奇偶性:
(1)eqIdd8ff6b4542ff490ba6bbdf8bfdfc6a30;(2)g(x)=x4+2;
(3)eqId0528d3c2218e4f3e83f8df58161b3d25;(4)eqId0a9ddbff43dd4795a08fc3f9c8271c3d.