(单选题)1:【图片问题】 id=\PIahtazitem20201220092734053.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIahtazitem20201220092734053.png?Expires=1923830852&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=NkCBdvReyOhWefjzIz7M8Y1EN1A%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)2:【图片问题】 id=\PIqgqaditem20201220092734145.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIqgqaditem20201220092734145.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=h28iSWQA9SOhNkhleVGBjII6TTA%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)3:【图片问题】 id=\PIydavpitem20201220092734269.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIydavpitem20201220092734269.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=h8NGW1DLw2qZfCV%2F9kMPUNH7FbM%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)4:【图片问题】 id=\PInxxghitem20201220092734382.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PInxxghitem20201220092734382.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=sqs2PldlwVEKOTQWl7f0z%2Ffua%2Bo%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)5:【图片问题】 id=\PIuujryitem20201220092734486.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIuujryitem20201220092734486.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=tGH5x8aUF1A%2B8T0sPgYNoCAFtDw%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)6:【图片问题】 id=\PItowlgitem20201220092734604.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PItowlgitem20201220092734604.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=9LOtVspXNBELO8BqzcjoiTwTywM%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)7:【图片问题】 id=\PIsqluritem20201220092734733.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIsqluritem20201220092734733.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=Sk3v8WdLEiIKuCD3znDOp%2FYLt8U%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)8:【图片问题】 id=\PIdqgdmitem20201220092734858.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIdqgdmitem20201220092734858.png?Expires=1923830853&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=SSiWCiwi9HR7gjtjAccXGfay5hI%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)9:【图片问题】 id=\PIaslfritem20201220092734922.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIaslfritem20201220092734922.png?Expires=1923830853&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=llhoEG6FUb8TZkTV2ITIsqqngj0%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)10:【图片问题】 id=\PIfluyyitem20201220092733634.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIfluyyitem20201220092733634.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=4cXwg6oLM44uQGS1T%2BlYP7cQseM%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)11:【图片问题】 id=\PIwylahitem20201220092735138.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIwylahitem20201220092735138.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=zqr4YY9CqzCi5yQkmayvCbtL11E%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)12:【图片问题】 id=\PIrqtfritem20201220092735264.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIrqtfritem20201220092735264.png?Expires=1923830853&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=v7P37qlPn57md0QqGiVOSDOTkII%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)13:【图片问题】 id=\PIfqcxcitem20201220092734001.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIfqcxcitem20201220092734001.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=TcfOfn%2FW7UTMRU4h92z%2B865CETc%3D\ />
A:18
B:8
C:0
D:-7
E:-18
(单选题)14:【图片问题】 id=\PIkakeyitem20201220092734116.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIkakeyitem20201220092734116.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=PODXlgA17JbBKi%2Bk280JOGJbxPQ%3D\ />
A:1
B:2
C:3
D:4
E:5
(单选题)15:【图片问题】 id=\PIvspkhitem20201220092735622.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIvspkhitem20201220092735622.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=RPohg5QX%2BI5UbRiuvZzqgzWXNHY%3D\ />的充要件是
A:k≠-1或k≠3
B:k≠-1且k=3
C:k=-1或k=3
D:k≠-1且k≠3
E:k=-1且k=3
(单选题)16:【图片问题】 id=\PIfgiuhitem20201220092735762.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIfgiuhitem20201220092735762.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=aR%2BmWZws%2BaFmaZ5ppRwd%2B09oQqc%3D\ />的充要件是
A:k≠-1或k≠3
B:k≠-1且k=3
C:k=-1或k=3
D:k≠-1且k≠3
E:k=-1且k=3
(单选题)17:当( )时【图片问题】 id=\PIyhxycitem20201220092735840.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIyhxycitem20201220092735840.png?Expires=1923830855&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=d6wSUWYhYE7vs9rwkK88S0Sy1RY%3D\ />
A:k=-1或k=-3
B:k≠1或k=-3
C:k=1或k=3
D:k≠1或k≠3
E:k=-1或k≠3
(单选题)18:当( )时【图片问题】 id=\PIzfhlmitem20201220092735944.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIzfhlmitem20201220092735944.png?Expires=1923830854&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=T3Ag92gVuAnsZfTxTe5NYM%2B%2FYIU%3D\ />
A:k=-1或k=-3
B:k≠1且k=-3
C:k=1或k=3
D:k≠1且k≠3
E:k=-1且k≠3
(单选题)23:【图片问题】 id=\PIduzaxitem20201220092738606.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIduzaxitem20201220092738606.png?Expires=1923830858&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=RdjJOFt0Y87hiRY9oaMVZvZVAhs%3D\ />
A:a≠1
B:a≠2
C:a≠3
D:a≠4
E:a≠5
(单选题)27:【图片问题】 id=\PIrbmalitem20201220092740489.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIrbmalitem20201220092740489.png?Expires=1923830860&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=lJOj9ujnQkTij%2BNsmHwScFfISVA%3D\ />
A:0
B:2M
C:-2M
D:8M
E:-8M
(单选题)28:【图片问题】 id=\PIkzbrnitem20201220092740594.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIkzbrnitem20201220092740594.png?Expires=1923830859&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=r2Fc62N9eVgf9%2FVQkvcK8jdg5sY%3D\ />
A:8
B:-12
C:24
D:-24
E:12
(单选题)29:【图片问题】 id=\PIrqdifitem20201220092740693.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIrqdifitem20201220092740693.png?Expires=1923830859&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=P6rMqzfO1lDEsBKJY7b1UThyOys%3D\ />
A:-D
B:(-1)nD
C:D
D:D-1
E:0
(单选题)30:一个n阶行列式展开后带正号的项有( )个。
A:n/2
B:n2/2
C:n(n-1)/2
D:n!/2
E:n(n+1)/2
(单选题)31:n阶行列式的展开式中共有( )个项。
A:n
B:n2
C:n(n-1)
D:n!
E:n(n+1)
(单选题)32:【图片问题】 id=\PIgbnbyitem20201220092739451.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIgbnbyitem20201220092739451.png?Expires=1923830860&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=NDP5AUoIKKDg4bqe1FDIvr%2Fwdq8%3D\ />
A:0或1
B:0或-1
C:1或-1
D:1或2
E:-1或2
(单选题)33:【图片问题】 id=\PIhwzviitem20201220092740919.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIhwzviitem20201220092740919.png?Expires=1923830860&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=hC2HWzRDn282626vgcZVAENLwEI%3D\ />
A:6
B:12
C:-12
D:-6
E:2
(单选题)34:【图片问题】 id=\PIctcxfitem20201220092740998.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIctcxfitem20201220092740998.png?Expires=1923830861&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=kMWqNXOgwrQpDsaV%2F0P9Kgcxeoo%3D\ />
A:0
B:391
C:-391
D:-17
E:17
(单选题)35:【图片问题】 id=\PIwsyomitem20201220092741154.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIwsyomitem20201220092741154.png?Expires=1923830861&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=wci2QK5ixE0ZkzwACv7tQQM%2Fv9I%3D\ />
A:1
B:9
C:18
D:27
E:54
(单选题)36:【图片问题】 id=\PIemkkpitem20201220092739920.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIemkkpitem20201220092739920.png?Expires=1923830859&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=hYZjdMbKtcyPd8zJ3HLi%2Byic%2BG4%3D\ />
A:10
B:16
C:-10
D:160
E:-160
(单选题)37:【图片问题】 id=\PIvjcsditem20201220092739995.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIvjcsditem20201220092739995.png?Expires=1923830861&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=S2gs1EmcAqASUw6BKTSNizz4y64%3D\ />
A:x=-1或x=3
B:x=-3或x=-1
C:x=-3或x=1
D:x=1或x=3
E:x≠1或x≠3
(单选题)38:【图片问题】 id=\PIigrfwitem20201220092740082.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIigrfwitem20201220092740082.png?Expires=1923830860&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=S57C677%2F5opuVkeIyPirZTUTVeo%3D\ />
A:x=-2且x=-1
B:x=1且x=-2
C:x=-1或x=2
D:x=-2或x=-1
E:x=1或x=2
(单选题)39:【图片问题】 id=\PInczbbitem20201220092740214.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PInczbbitem20201220092740214.png?Expires=1923830861&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=Jl5NRVGOTHy6Vuzc%2FxlyAK%2Fdy%2Fw%3D\ />不全为零那么以下判断错误的是矩阵A( )。
A:既是上三角又是对称矩阵
B:既是下三角又是对角矩阵
C:既是上三角形又是下三角矩阵
D:既是上三角形又是对角矩阵
E:既是下三角又是反对称矩阵
(单选题)40:【图片问题】 id=\PIwhzwmitem20201220092741667.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIwhzwmitem20201220092741667.png?Expires=1923830861&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=ABMrmlA25%2BuYgMNRv%2Fkq09kjvo4%3D\ />
A:12
B:-24
C:3/2
D:-12
E:24
(单选题)41:已知A是m×n矩阵B是n×m矩阵(m≠n)则下列( )的运算结果是n阶方阵。
A:AB
(单选题)45:【图片问题】 id=\PIxlxrvitem20201220092744152.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIxlxrvitem20201220092744152.png?Expires=1923830864&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=ZMAIS4zSs8NfxouVi7BKVGl5mGc%3D\ />
A:-2
B:4
C:32
D:-32
E:2
(单选题)46:【图片问题】 id=\PIdxjtvitem20201220092744236.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIdxjtvitem20201220092744236.png?Expires=1923830864&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=zDw40kVbYiSf9fvD9wp2z%2BXb6mI%3D\ />
A:5
B:25
C:1/5
D:15
E:1/25
(单选题)49:【图片问题】 id=\PIvjacxitem20201220092744282.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIvjacxitem20201220092744282.png?Expires=1923830865&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=OcmXFndqLZUSo2gDahf17STJg68%3D\ />
A:(1483)
B:(162136)
C:(1410)
D:(041832)
E:(282440)
(单选题)52:设A是上三角矩阵那么A可逆的充分必要条件是A的主对角元( )。
A:全部非负
B:不全为零
C:全部非零
D:全部非正
E:没有限制
(单选题)53:如果A、B是同阶对称矩阵则AB( )。
A:一定为对称矩阵
B:一定为非对称矩阵
C:一定反对称矩阵
D:不一定是对称矩阵
E:一定是对角矩阵
(单选题)55:【图片问题】 id=\PIjsipritem20201220092747683.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIjsipritem20201220092747683.png?Expires=1923830867&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=aaA23ibIdxQewLeTc5pFsNGMAZY%3D\ />
A:1/5
B:5
C:52
D:53
E:0
(单选题)59:【图片问题】 id=\PIwduruitem20201220092749207.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIwduruitem20201220092749207.png?Expires=1923830869&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=Dn950qpPRI6pUiSujIARqSAWCY8%3D\ />
A:a
B:1/a
C:an-1
D:an
E:a1-n
(单选题)61:【图片问题】 id=\PIoyjklitem20201220092748404.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIoyjklitem20201220092748404.png?Expires=1923830869&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=4QR6viAjLIyyX1SiaF8n4X2XFL8%3D\ />
B:2
C:2n
D:2n/2
E:2-1
(单选题)62:若n阶方阵A满足A2+A=0其中E为单位矩阵则矩阵A+2E的逆矩阵为
A:A+E
B:-2(A-E)
C:1/2(A+E)
D:-1/2(A-E)
E:A-E
(单选题)63:若n阶方阵A满足A2-2A-3E=0 其中E为单位矩阵则矩阵A的逆矩阵为
A:A-2E
B:2E
C:3(A-2E)
D:1/3(A-2E)
E:3E
(单选题)66:设A是n阶方阵X是n ×1矩阵在下列运算中只有( )正确。
A:XAX
(单选题)67:【图片问题】 id=\PImgbovitem20201220092750460.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PImgbovitem20201220092750460.png?Expires=1923830871&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=Gq3bj5LqNsIWyGhN4YG%2BHLwMnNU%3D\ />
A:AB
(单选题)70:【图片问题】 id=\PIwmedzitem20201220092753575.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIwmedzitem20201220092753575.png?Expires=1923830872&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=hm4ISYULITCo7Nl%2BGoXt3W7q2WQ%3D\ />
A:交换A的第一、二行
B:交换A的第二、三行
C:交换A的第一、二列
D:交换A的第二、三列
E:交换A的第一、三列
(单选题)71:【图片问题】 id=\PImduuaitem20201220092753653.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PImduuaitem20201220092753653.png?Expires=1923830872&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=vQIQYuwLyMjobXqm5nNdqShzBEA%3D\ />
A:将A的第一行的3倍加于第三行
B:将A的第一行乘以3
C:将A的第三列乘以3
D:将A的第三列的3倍加于第一列
(单选题)73:数k能与n维向量直接进行的运算是( )。
A:加法运算
B:减法运算
C:乘法运算
D:除法运算
E:求逆的运算
(单选题)74:( )不属于向量的线性运算。
A:两个n维向量的对应分量相加
B:两个n维向量的对应分量相乘
C:两个n维向量的对应分量相减
D:一个n维向量的各个分量同乘以任意一个数
E:一个n维向量的各个分量同除以任意一个非零数
(单选题)75:若向量α、β线性相关则( )。
A:α=κβκ是数且必不为零
B:其中必有一零向量
C:αβ一定是非零向量
D:αβ对应分量成比例
E:其中必有一单位向量
(单选题)76:若向量组线性相关则它的部分向量组是( )。
A:一定线性相关
B:一定线性无关
C:可能线性相关但不可能线性无关
D:不可能线性相关但可能线性无关
E:可能线性相关也可能线性无关
(单选题)77:【图片问题】 id=\PIucpxyitem20201220092754339.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIucpxyitem20201220092754339.png?Expires=1923830874&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=ddBGgUacXi4ylVrPbDrQ6RODshI%3D\ />
A:一定线性相关
B:一定线性无关
C:可能线性相关但不可能线性无关
D:既不可能线性相关也不可能线性无关
E:可能线性相关也可能线性无关
(单选题)81:【图片问题】 id=\PIcixxjitem20201220092756643.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIcixxjitem20201220092756643.png?Expires=1923830876&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=qFXZ9xEdZGtEhp5yLzz7jJ7FZ28%3D\ />
A:a≠0
B:b≠0
C:c≠0
D:b=0
E:c=0
(单选题)84:【图片问题】 id=\PIzmlqfitem20201220092758329.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIzmlqfitem20201220092758329.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=vOX%2Fvc7sH3%2BBGs31qVLX0so990M%3D\ />
A:-1
B:1
C:1/2
D:-1/2
E:0
(单选题)85:【图片问题】 id=\PIdtjvfitem20201220092758421.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIdtjvfitem20201220092758421.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=HTwZx00%2F9pkhWVBNKoaQYIdWkN8%3D\ />
A:3
B:-2
C:-1
D:0
E:1
(单选题)86:【图片问题】 id=\PIoudbxitem20201220092758549.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIoudbxitem20201220092758549.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=EAWDinyBX9Zh8LqmQE1ZxZcDXFo%3D\ />
A:0
B:1
C:2
D:3
E:4
(单选题)87:【图片问题】 id=\PIbfxzaitem20201220092757274.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIbfxzaitem20201220092757274.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=E56JCRc8qOWPbevowvuII22UJoE%3D\ />
A:0
B:1
C:2
D:3
E:4
(单选题)88:如果m个方程n(m<=\\>
A:R(A)=n
B:R(A)=m
C:R(A)<n<label=\\></n<>
D:R(A)<m<label=\\></m<>
E:R(A)=min(mn)
(单选题)89:【图片问题】 id=\PIdryywitem20201220092757392.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIdryywitem20201220092757392.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=w%2F68TsPwORzNuRBbaWJcNswZgwg%3D\ />
A:无解
B:仅有零解
C:必有非零解
D:可能有非零解
E:仅有非零解
(单选题)90:【图片问题】 id=\PIngmrbitem20201220092758908.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIngmrbitem20201220092758908.png?Expires=1923830878&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=k0o0c9iyknfufAWzzPxZ2OMwDHc%3D\ />
A:0
B:1/2
C:-1
D:1
E:-1/2
(单选题)95:【图片问题】 id=\PItbeiwitem20201220092801921.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PItbeiwitem20201220092801921.png?Expires=1923830881&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=IMVkackuhWBrwUw6I%2BFA%2FthFCZc%3D\ />
A:解向量
B:基础解系
C:全部解
D:A的行向量
E:非零解
(单选题)97:三个方程和四个未知量的线性方程组AX=b若( )成立则一定有解。
A:R(A)=1
B:R(A)=2
C:R(A)=3
D:R(Ab)=3
E:R(Ab)=4
(单选题)98:【图片问题】 id=\PIvmptmitem20201220092801429.png\ src=\https://oescdn.open.com.cn/zyglpt/PI/item/2020/1220/PIvmptmitem20201220092801429.png?Expires=1923830882&OSSAccessKeyId=gbI8DRLk7JJhLbEw&Signature=E3uaxjWSPP3Gxgp6zLR2Ak3Eq0g%3D\ />
A:R(A)=5
B:R(Ab)=5
C:R(A)=R(Ab)=5
D:R(A)=R(Ab)=4
E:R(Ab)=4
(判断题)99:偶数阶反对称行列式不等于零。
T:对
F:错
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