1 . 解不等式组及计算:
(1)解不等式组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b2fdadaaec3762b29658146dd94010.png)
(2)因式分解:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93aeb4732bc25e7793e70e618e2a60b5.png)
(3)解方程:
;
(4)先化简,再求值:
,从
,0,2中取一个合适的数作为x的值代入求值.
(1)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b2fdadaaec3762b29658146dd94010.png)
(2)因式分解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93aeb4732bc25e7793e70e618e2a60b5.png)
(3)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4a16ba60d105e018f5bad9ed3e3ad0.png)
(4)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0053981d6fa80df1c15ec84fccd700a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
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2 . 已知反比例函数
的图像经过点
.
(1)求
的值为 ;
(2)完成下列解答:解不等式组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504df4bcf895161e82a657da3c5e082a.png)
(Ⅰ)解不等式①,得 ;
(Ⅱ)根据函数
的图像,得等式②的解集为 ;
(Ⅲ)把不等式①和②的解集在数轴上表示出来,得到不等式组的解集为 ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7e80d8fb6c014b585cb0902275600b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)完成下列解答:解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504df4bcf895161e82a657da3c5e082a.png)
(Ⅰ)解不等式①,得 ;
(Ⅱ)根据函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
(Ⅲ)把不等式①和②的解集在数轴上表示出来,得到不等式组的解集为 ;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/f840ee68-a215-486b-b43f-a1e1152c8e5b.png?resizew=218)
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2022高一·全国·专题练习
3 . 已知
,
满足方程组
,且
.
(1)试用含
的式子表示方程组的解;
(2)求实数
的取值范围;
(3)化简
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74505a91ab0c9038b2e5481131bb1342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8d93ef14e700c6bed4e4d31625925a.png)
(1)试用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3d52af08461102a97ea9cc12ea168a.png)
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2022高一·全国·专题练习
4 . (1)解不等式
,并将其解集在数轴上表示出来;
(2)解不等式组并把解集在数轴上表示出来:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64628175df0e4fd35d2d618e615f4bc.png)
(2)解不等式组并把解集在数轴上表示出来:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5683b7974117fff8aa416c389b985ff3.png)
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5 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ecc28a111519c5b460d8edbb2f220.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ecc28a111519c5b460d8edbb2f220.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b09d6e8a3681a274abae6aefbdb066.png)
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20-21高一·江苏·课后作业
6 . 重新考查不等式
.这个不等式的左边可分解因式为
.根据实数乘法的符号法则,问题可归结为求一元一次不等式组(1)
和(2)
.的两个解集的并集
不等式组(1)的解为
,不等式组(2)无解,从而不等式
的解集为
.
试用上述方法解下面的不等式:
(1)
; (2)
;
(3)
; (4)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1efbf762119867ae3b97f31df4a0c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d852cf61a25d86240ce9625b768802f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57168f04622ebb6a69176f02835c6d4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11954b8851892690b2548d3507108db.png)
不等式组(1)的解为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debe21e6fbd160fd147eddd2849c96b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1efbf762119867ae3b97f31df4a0c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34656e75013a8d11e63e2c677d1b9aaa.png)
试用上述方法解下面的不等式:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7d1cad89cd84c0cf1f68d4b2ecb43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30f7934cfaaacbda8d9d035afe63e89.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e720d34ced3d82ad59f3c41e7137470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e898c180d3aaab86acda33b736a1ce.png)
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名校
7 . (1)计算:
;
(2)先化简,后求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2393fbd54f9528459f5f5cbe0290c1a.png)
(2)先化简,后求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8998c5f571a64b637a2366ecb19a37e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
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8 . 购房分期付款模型是这样的:设贷款
元,年利率为
,按复利计算,并从借款后次年年初开始每次等额归还,第
年后全部还清(也可以按月等额归还).那么第
年后剩余款额
.由
,解得
.请你仔细阅读上述模型,再给出一个运用该模型的应用题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb44db1dc864ff4901be1e10da79747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafea68dded73dde200b5b4a733f4984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99690f6a88193dae73ba8d3eecee479c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b705b553add97af351866166d63ee179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a37c24bbf6c9d4a9eec90d2393697ef.png)
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名校
9 . (1)化简:
.
(2)求值:
.
(3)设
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9425b2d567b729467fec9498c183e32d.png)
(2)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349678bf311bf77582444d12907a4428.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5aca7f0097fc0562c40375ce6756d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bb6f1d6a053b78c221624885791f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2893bd2a2299d8180f45494ba593d1.png)
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解题方法
10 . 已知
,求证
.某同学解这道题时,注意到结论中的三个量
,
,
.由已知条件得到
,
,
.进一步发现三者的关系:
.又观察左边式子的结构发现就是两个数的倒数和,从而联想到以前做过的题目“已知
,
,求证
”,类比其解法得到题目的解法:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60d4d44e161c4c3e151ad73024a8228.png)
,当且仅当
时取等号.所以
.求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497d269c30eec393e3f0e877ddbe2983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323f4e181b418a66cc36d75e0f8da126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db8d3facff8f90f28a936fc5b3ab878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea712984ea5017140e20bee226fd5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481ee0d1e39e92a4732eea90225eb94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936553b69099e03189581a42a5c1d8aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e90787c63ca5b5f1a45e0f6e85aaa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c05be59bdd7874fd8e9ee5ba5b17f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86546d8c56d9c72822cc2c834e240ad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60d4d44e161c4c3e151ad73024a8228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55eb4703dc394b53fef7d12030c470d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914c9d4dc14490413e77f6262d2a7aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323f4e181b418a66cc36d75e0f8da126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e743594b98ac2006344494dddfb345.png)
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