1 . 在同一副扑克牌中抽取2张“黑桃”,5张“梅花”,3张“方块”,将这10张牌背面朝上,从中任意抽取1张,是“方块”的概率为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 下列各式:①
;②
;③
;④
;⑤
,其中计算正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111848feaac6190bc8d4f98c56aaa93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19085f2f3fa5264f5ec1a9fcf7e30330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba92522ec440429bc91ed5a359a9f8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff58e47500ee4ed5b74453118d94980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c256c5c9e5b75bb4025d3cad9145183.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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3 . 已知
是二次函数
图象上的一系列点,其中
,记
(n为正整数),令
,则S的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb1b052b4fbeab908e1e3d4a2903f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5109eb35b9c16fc5e128198a1819a44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f74cba0f2dcda7e483808b7aaaabb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414502a9d5420715cb39e6fc2d64c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeaeefb8d052ab78155b326f7392555d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知点
,
,
均在抛物线
上,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d57111dd825830d87e5a8ba28cf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5e695fbbd1a4c076757c2172e9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213632685641d1d75ce7e827db800b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68846e796086eeff26e70135fdff94fb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b43498cdea91037bd093c1100af4f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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6 . 如图,在
中,
,
,
以点
为圆心,
的长为半径画弧,交线段
于点
,以点A为圆心,
长为半径画弧,交线段
于点
,则下列线段的长度是方程
的一个根的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/fbed1bc0-8bbc-4819-b62e-2b117767ee93.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b148ebf7b5ca9cc3a6f1dfe3117cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7531f413a2b9bb13bab60e2b00569aeb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/fbed1bc0-8bbc-4819-b62e-2b117767ee93.png?resizew=145)
A.线段![]() | B.线段![]() |
C.线段![]() | D.线段![]() |
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7 . 如图,长为
的橡皮筋放置在
轴上,固定两端
和
,然后把中点
向上拉升
至
点,则橡皮筋被拉长了( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/99c5d5e7-683f-4fd9-a08a-7e52accda875.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/99c5d5e7-683f-4fd9-a08a-7e52accda875.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
8 . 在线段
上有P、Q两点,
,求
的长( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed57f367faad251495c6640760bcb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
A.1 | B.23 | C.1或23 | D.12 |
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名校
解题方法
9 . 世界近代三大数学难题之一哥德巴赫猜想于
年由哥德巴赫在给欧拉的信中提出:任一大于
的偶数都可写成两个奇素数之和
这个猜想至今没有完全证明,目前最前沿的成果是
年我国数学家陈景润证明了“
”,即他证明了任何一个充分大的偶数,都可以表示为两个数之和,其中一个是素数,另一个或为素数,或为两个素数的乘积,被称为“陈氏定理”
我们知道素数又叫质数,是指在大于
的自然数中,除了
和它本身以外,不能被其他自然数整除的数
请问同学们,如果我们从不大于
的自然数中任取两个不同的数,这个两个数都是素数有多少种不同的情况?( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502fe07ce6e376fa245888f3387e7621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a7b9c9c2c795160ab396b1db638b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e8963c6be06b6acc8434203e17a6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-10-02更新
|
41次组卷
|
2卷引用:湖南省长沙市南雅中学2022-2023学年高一上学期入学考试数学试题
10 .
是某三角形三边的长,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd541b06793cd1f3565f7b8c3585632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b7af678ebff18e0a36362d7039a5dd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-09-05更新
|
187次组卷
|
2卷引用:江苏省镇江市扬中市第二高级中学2022-2023学年高一上学期入学测试数学试题