已知代数式
,
,
,下列结论中,正确的个数是( )
①若
,则
;
②若
,则一次函数
的图象必定经过第一、三、四象限;
③若x,y,z为正整数,且
,则
;
④若
,
,且x为方程
的一个实根,则
与
的值相等;
⑤若
,
,则
的值为28.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883be1046dd3ddf42cc99e4c11236bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c551d754f3b8d8ad728cfd4fc34a8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b0a141b11c5925e67dbda3ca5a905a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f106abfef9c23b318909a4bcae031e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e01cf42ee59ff6a8b07e35ebe6ba0c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefd4989aa91bfd6ad21998e1186f708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46b4e950b6fc1f7885ec992eab7b9ea.png)
③若x,y,z为正整数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d561cdf17d3a6d7d57af719cb6100c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08bf0a121ade364913ff0d231f0315.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2764dbfd55c4149f6c2ba3ef87b9416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90842f726e2ae6363aec5cfa1a8612a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4447bd2b65b0ca1d8f7c3f9a3b8d61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786d123385ea2ea13445c8f4b6a9f004.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4554d489ccefdc4159b80e10fc4beaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba481ab266c982b6fd7d1c267380ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3560fd8d74d08fa665a2e049a0e3f23c.png)
A.1 | B.2 | C.3 | D.4 |
22-23九年级下·重庆九龙坡·开学考试 查看更多[3]
更新时间:2023-02-10 13:21:52
|
相似题推荐
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【推荐1】有
个依次排列的整式:第1项是
,用第1项
减去
得到
,将
乘以
得到第2项
,再将第2项
减去
得到
,将
乘以
得到第3项
,…,以此类推,下面四个结论中正确的个数为( )
①方程
的实数解为
;
②
;
③第2023项
;
④若
为整数,且
值为整数,则
的取值个数为4个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39dd234e9d2c93de600497d0bdaa74ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb83fefa43d00caf77901733af915250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb83fefa43d00caf77901733af915250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781bafb821f3926666006bee31bbb3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95cd89f3322b212a357d9eb7f5f53cb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7c57511f07c5468c903ca3ed7538f8.png)
③第2023项
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d74fa4f9b9bb2565b397fc813b94bf.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872bbe2477dfba7c3ebf4944552fbdbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.4 | B.3 | C.2 | D.1 |
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【推荐2】已知多项式
,其中x为任意实数,则下列结论中正确的有( )
①若
,则
;
②若
,则
;
③若
,则此关于x的方程一定有4个互不相等的实数解;
④若分式
的值为整数,则整数x的值有4个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c51be951e27aec64a7789b998b191aa.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2d89c5ce7367a85720d3f92ff0fc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0e7f6dd527ec2af71b3cce088965f5.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9f2cb9b8acfdd0310252482e786982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6cef02d6138f662422702856528966.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7decbdd14812cd70582a0d0e86a34cd5.png)
④若分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b501d5a188b88fcdd8aeb09e50b19e.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】如果一元二次方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
满足
,那么我们称这个方程为“阿凡达”方程,已知
是“阿凡达”方程,且有两个相等的实数根,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2b5ee1eabb64358a3d9db2349b6fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2fcd04d62f953f6949f97b1e4fbbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】关于
的一元二次方程
有一个根是
,若二次函数
的图象的顶点在第一象限,设
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbc995035be3c763aad9b150c77a7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944ac2e3ae6fe2afd3a6cc0eed8bbd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247e2a6a6630305c3b3807d8beb66a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea657289628000a62a6e4b9ccaede54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08075b3b73dd2609baad69a496fdd9a8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知
,则直线
一定经过( )
![](https://img.xkw.com/dksih/QBM/2014/3/16/1573714457559040/1573714463162368/STEM/68451a3fa8144cde9b0548fa54ab09cb.png)
![](https://img.xkw.com/dksih/QBM/2014/3/16/1573714457559040/1573714463162368/STEM/4d81bf072bb948c8bb23e432400edae2.png)
A.第一、二象限 | B.第二、三象限 |
C.第三、四象限 | D.第一、四象限 |
您最近一年使用:0次
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【推荐2】已知代数式
,
,
,下列结论中,正确的个数是( )
①若
,则
;
②若
,则一次函数
的图像必过第一、三、四象限;
③若
,
,
均为正整数,且
,则
;
④若
,
,且
为方程
的一个实数根,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883be1046dd3ddf42cc99e4c11236bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c551d754f3b8d8ad728cfd4fc34a8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b0a141b11c5925e67dbda3ca5a905a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f106abfef9c23b318909a4bcae031e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e01cf42ee59ff6a8b07e35ebe6ba0c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7f49dbd48f890a3249b1781a3a4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46b4e950b6fc1f7885ec992eab7b9ea.png)
③若
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d561cdf17d3a6d7d57af719cb6100c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08bf0a121ade364913ff0d231f0315.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2764dbfd55c4149f6c2ba3ef87b9416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90842f726e2ae6363aec5cfa1a8612a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dab8bcd39cf3014764833cd4b2486a0.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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|
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【推荐1】已知代数式
,
,
,下列结论中,正确的个数是( )
①若
,则
;
②若
,则一次函数
的图像必过第一、三、四象限;
③若
,
,
均为正整数,且
,则
;
④若
,
,且
为方程
的一个实数根,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883be1046dd3ddf42cc99e4c11236bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c551d754f3b8d8ad728cfd4fc34a8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b0a141b11c5925e67dbda3ca5a905a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f106abfef9c23b318909a4bcae031e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e01cf42ee59ff6a8b07e35ebe6ba0c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7f49dbd48f890a3249b1781a3a4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46b4e950b6fc1f7885ec992eab7b9ea.png)
③若
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d561cdf17d3a6d7d57af719cb6100c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08bf0a121ade364913ff0d231f0315.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2764dbfd55c4149f6c2ba3ef87b9416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90842f726e2ae6363aec5cfa1a8612a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dab8bcd39cf3014764833cd4b2486a0.png)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】把一条线段分割为两部分,使较大部分与全长的比值等于较小部分与较大的比值,则这个比值为黄金分割,比值为
,它被公认为是最能引起美感的比例,如图
为世界名画蒙娜丽莎.如图
,点
是正方形
的
边上的黄金分割点,且
,以
为边作正方形
,延长
交
于点
,连结
交
于点
,连结
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449a8d310f2f2a19a469943f2be14483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed297bfc6197d7030f3dbfc237360fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc14b9e264c42e07e5dbb4503d2dcc79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9020059d62af7498039f091de6f005ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16180bf5207ed68d58bcdcb9661b583d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次