1 . 如图所示数阵,第
行共有
个数,第
行的第1个数为
,第2个数为
,第
个数为
.规定:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c97394c9634fde6e772872b54b6249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f195253d3a2bc6383233e3515903c5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0991d363c974fad83457c6a78b0152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ce15fa76fda687b1c1fbdc2480c524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e4a4975dd419a1c65724385950c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34607bb95c84c3bd775c144255895f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所在数之和等于下一行的最后一个数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c15166e2227c8c8582bc17f818fa43d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29a285201fd7e0ad70fa7431cb89a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0749c4129afc0c704155f522290b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715a3f984d2627afd7c40c61347b7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5222268dda9dcb9b660f3cbedbb37757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f1e3925bda80e8223bf7e431585847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b344ab26012e4cc663266f04dd700cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c97394c9634fde6e772872b54b6249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ce266899f72edea3187f4857b802ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d3bec9b8bdeca73764d9d2eb2c0a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f195253d3a2bc6383233e3515903c5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89299ff7b560424509825ce7c690c5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcad334979e1fa0bef47d84c3c3c101a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fc7959cf1daf71f15861bc4704b111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0991d363c974fad83457c6a78b0152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db1e5ed0e2b01da100e896189c6312d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ee0101530cdc106c05caca4b7014ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c68792cc182e16074dfeaa1bbc7e166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d405be4f523f33ffc67f0d67c129cb7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ce15fa76fda687b1c1fbdc2480c524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9851d400de384cb46bbefdbfc8cdd3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f159ced7d6594cc3d4f7a88fd9bc4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332ab3261e4e33b0948263ba058dc147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d450cef132b9dec887ecd711de4603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a71f2064dc04af9382d1ef31feb0d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e4a4975dd419a1c65724385950c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785606cbba01206e9d91cb3e6d4d2ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40e77f739724cbfb3bdfd17ba44e238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df9830c93a2b4e7350544ffd662b82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6585c61fd9ef5eaa86493b7c65ef581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace8be106f1402565ea778f0818bda9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb5c42bd7166ff6486b3b69ba1e1d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34607bb95c84c3bd775c144255895f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所在数之和等于下一行的最后一个数;
您最近一年使用:0次
2 . 如图所示数阵,第
行共有
个数,第m行的第1个数为
,第2个数为
,第
个数为
,规定:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96a1efc782c7cbbbd7ccd55ae6c06c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6442c68ee525e11e798702dcca3f4ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d80851ce143df1c3e1f7bd0bb28754d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8869622c406f60ca66f66cbf7e0f94cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c9cefa7564754d75af2709b98b559c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82123c3c62e343e06a547f58ea074bea.png)
…… … … … … …
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所有数之和等于下一行的最后一个数;
(3)从第1行起,每一行最后一个数依次构成数列
,设数列
的前n项和为
是否存在正整数k,使得对任意正整数n,
恒成立?如存在,请求出k的最大值,如不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdd4f87e7e7e32d723d7e97d980db42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29a285201fd7e0ad70fa7431cb89a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0749c4129afc0c704155f522290b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae0b861522b18be1753acc4474cbc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5222268dda9dcb9b660f3cbedbb37757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f1e3925bda80e8223bf7e431585847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96a1efc782c7cbbbd7ccd55ae6c06c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6442c68ee525e11e798702dcca3f4ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d80851ce143df1c3e1f7bd0bb28754d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8869622c406f60ca66f66cbf7e0f94cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c9cefa7564754d75af2709b98b559c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82123c3c62e343e06a547f58ea074bea.png)
…… … … … … …
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所有数之和等于下一行的最后一个数;
(3)从第1行起,每一行最后一个数依次构成数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e8660fb54ba32b037b392b75316087.png)
您最近一年使用:0次
3 . 如图所示数阵,第
行共有
个数,第
行的第1个数为
,第2个数为
,第
个数为
.规定:
.
(2)从第1行起,每一行最后一个数依次构成数列
,设数列
的前
项和为
,是否存在正整数
,使得对任意正整数
,
恒成立?如存在,请求出
的最大值;如不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5726ebd95b22e5f7971028479790df77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29a285201fd7e0ad70fa7431cb89a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0749c4129afc0c704155f522290b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee754f9af67705c16c167733b5ef75db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5222268dda9dcb9b660f3cbedbb37757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ef9ec4340eabb42722042c65cc60d8.png)
(2)从第1行起,每一行最后一个数依次构成数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e8660fb54ba32b037b392b75316087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
4 . 在计算机科学中,
维数组
是一种基础而重要的数据结构,它在各种编程语言中被广泛使用.对于
维数组
,定义
与
的差为
与
之间的距离为
.
(1)若
维数组
,证明:
;
(2)证明:对任意的数组
,有
;
(3)设集合
,若集合
中有
个
维数组,记
中所有两元素间的距离的平均值为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb13ab18937e51cc842fa85defe2b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a5369bb892f707c3f0a2ac2fa18f2b.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/8373ec34bc1c49f29b672cec668a7189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab4a9bfa50054c808dd8190305d0abd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e1d1f71b5aee622ad3bb731172aaac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5725a091f17274ae34890339ae7178c.png)
(2)证明:对任意的数组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2748d82571d4ba75ae1ebdfacc011a7a.png)
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727a608a5ccb82aa87e46194fe7e2fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2ea5126ca30d68cc8b70f03860ba2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8e92f2312c156aa28806f810cc96d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3484a2499e9b47bd15e2cf721356798.png)
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5 . 图是一个 11阶的杨辉三角:
(2)在杨辉三角形中是否存在某一行,该行中三个相邻的数之比为1:3:5?若存在,试求出这三个数:若不存在,请说明理由.
(3)杨辉三角是杨辉的一项重要研究成果,它的许多性质与组合数的性质有关.如:从第3行开始,除了1以外,其它每一个数是它肩上的二个数之和;请尝试证明:当
,
,
,
(2)在杨辉三角形中是否存在某一行,该行中三个相邻的数之比为1:3:5?若存在,试求出这三个数:若不存在,请说明理由.
(3)杨辉三角是杨辉的一项重要研究成果,它的许多性质与组合数的性质有关.如:从第3行开始,除了1以外,其它每一个数是它肩上的二个数之和;请尝试证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b137a34d2d5b20671b7a3c7a29606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3b2acd01609f68646ca4605b88f9f3.png)
您最近一年使用:0次
6 . 某同学在研究二项式定理的时候发现:
其中
为
的系数,它具有好多性质,如:①
;②
;③
;请借助于该同学的研究方法或者研究成果解决下列问题:
(1)计算:
;(请用数字作答)
(2)若
,且
,证明:
;
(3)设数列
,
,
,…,
是公差不为0的等差数列,证明:对任意的
,函数
是关于x的一次函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee4921ae27ca39424685c8d48fcad66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb4fb20d3a3a67baa8505623e0bd9de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419279baeef6eb671bedee00d046b96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0540c6aa4a066b653fa303fb2f7e984c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28358a9b687fea8091fb586066e149ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e10e0bb04d7d261d880aea655e19db1.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f43b7aada649818eff36aafab684f32.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d330401bef4e7e848b6334ad7e1f944.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15227e8caefd537bde2d857fc323d94d.png)
您最近一年使用:0次
7 . 在计算机科学中,
维数组
是一种基础而重要的数据结构,它在各种编程语言中被广泛使用.对于
维数组
,
,定义
与
的差为
与
之间的距离为
.
(1)若
维数组
,证明:
;
(2)证明:对任意的数组A,B,C,有
;
(3)设集合
中有
个
维数组,记
中所有两元素间的距离的平均值为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6b93450a25edf994283872816f0a175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d3f2ae3aa8322ec0e2c36471bfc7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb963b1d6c794e8d3331214473f44d61.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/90154ab818dc6fd319683db8b642c3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447cf234057b2b23e80cc0ec6770de2c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288e149a1d5633a31b2fb684564e1547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebde3a4de6911a9cf5dcc9641c76f5dd.png)
(2)证明:对任意的数组A,B,C,有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8513f18376e4e456b939d0f1cdb6e602.png)
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176ff134abb231aa2b562ca6fe240a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423cc16756424271a003917fbca775b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3392856fc8ba3250d76f281e9f04129.png)
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8 . (1)证明:组合数性质
;
(2)计算:
(用数字作答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c11ed08d3d9d0ec32bcc817c14f4553b.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68dd633f0c99f35edb6edd42b6c7f9a.png)
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9 . 对正整数
,设数列
.
是
行
列的数阵,
表示
中第
行第
列的数,
,且
同时满足下列三个条件:①每行恰有三个1;②每列至少有一个1;③任意两行不相同.记集合
或
中元素的个数为
.
(1)若
,求
的值;
(2)若对任意
中都恰有
行满足第
列和第
列的数均为1.
①
能否满足
?说明理由;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3900a6f09149151f7d8479912e1a48e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1430ce165611dfc92e924a1cdc6c8220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223f93ed43c7772a367043ae224b75da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c734e1b65651e598e1a907a041664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51c223d60883c551607e8b6e8d7fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2dce4d63752586495edc8d58dfc45bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cde6077954017c6ac884c0e76662c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224dcfa6dae1dc0511ad72da8617283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2c5e187752ef828b307951da554bb.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32708eeade6cbb36e1dfda113eececd0.png)
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10 . 我国古代数学史上一位著述丰富的数学家,他提出的杨辉三角是我国古代数学重大成就之一.图为杨辉三角的部分内容.设杨辉三角中第n行的第r个数为
,观察题图可知,相邻两行中三角形的两个腰都是由数字1组成的,其余的数都等于它肩上的两个数相加.
(2)在杨辉三角中是否存在某一行,使该行中三个相邻的数之比为
?若存在,试求出这三个数;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2428b46c864b3c6d3db6d61069eaa4db.png)
(2)在杨辉三角中是否存在某一行,使该行中三个相邻的数之比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f297ba584bba1e46524033b61bee9163.png)
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