我
，求行列式|A-E|的值.
是否有解，有解时求出它的解.
，B=
，求：(1)ATB;(2)|ATB|.
，B=
，C=
，且满足AXB=C，求矩阵X.
，则行列式|B-1|=_________.
是正定矩阵，则a的取值范围为_______.
，B=(1，2，3)，则BA= .
中第4行各元素的代数余子式之和为_________.
__________.- 18
-
二次型
的矩阵为( )
的矩阵为( )- A.<img src="//img1.yqda.net/question-name/22/a2edd082ba631133f3013c392815f6.png" width="64" height="42"/>
- B.<img src="//img1.yqda.net/question-name/c2/16f5d64d66e83cceb172a5eb3f3431.png" width="70" height="62"/>
- C.<img src="//img1.yqda.net/question-name/07/f658652e6d85b8c9c1bed59a1e77f1.png" width="93" height="83"/>
- D.<img src="//img1.yqda.net/question-name/aa/6e96538f87390e8e7bc08d5c4517ac.png" width="89" height="62"/>
，则A的对应于特征值λ=0的特征向量为( )- A.(0，0，0)<sup>T</sup>
- B.(0，2，-1)<sup>T</sup>
- C.(1，0，-1)<sup>T</sup>
- D.(0，1，1)<sup>T</sup>
的极大线性无关组为( )- A.<img src="//img1.yqda.net/question-name/99/d3cf53b305a58a3ddb7fbf7b55a987.png" width="36" height="27"/>
- B.<img src="//img1.yqda.net/question-name/eb/3362e18f9808528c43ce65df93addc.png" width="36" height="27"/>
- C.<img src="//img1.yqda.net/question-name/b5/39ef78cc2895b0b1b5be3af76a509d.png" width="36" height="27"/>
- D.<img src="//img1.yqda.net/question-name/92/afc3a4f08911778443d9e8e6394cae.png" width="37" height="27"/>
，那么矩阵A的列向量组的秩为( )- A.3
- B.2
- C.1
- D.0
有一个特征值等于( )- A.<img src="//img1.yqda.net/question-name/31/f03f4c48cbd442b15144a0270f3a32.png" width="25" height="42"/>
- B.<img src="//img1.yqda.net/question-name/43/42342fc1f57ae7aea11d0e8fcf11cb.png" width="20" height="42"/>
- C.<img src="//img1.yqda.net/question-name/bb/554d10ecab8f46ffc631607621e061.png" width="8" height="42"/>
- D.<img src="//img1.yqda.net/question-name/75/730c1f79aada4a4bdc7a862026d854.png" width="8" height="42"/>
- A.0
- B.1
- C.2
- D.3
，若有常数a,b使
，则( )- A.a=-1, b=-2
- B.a=-1, b=2
- C.a=1, b=-2
- D.a=1, b=2
，则C-1是( )- A.<img src="//img1.yqda.net/question-name/78/2593eafebdfa40628be93afd250a5d.png" width="75" height="42"/>
- B.<img src="//img1.yqda.net/question-name/b3/512502ff1f381688a81c2b402e5b8f.png" width="75" height="42"/>
- C.<img src="//img1.yqda.net/question-name/ab/c44403a4b64415c9dfdbd2b0b0a083.png" width="75" height="42"/>
- D.<img src="//img1.yqda.net/question-name/c7/c976b48d275f58a595dcf80d86f064.png" width="75" height="42"/>
- A.<img src="//img1.yqda.net/question-name/b5/89fcb998c54a913dda55c5f9a725c7.png" width="158" height="42"/>
- B.3<img src="//img1.yqda.net/question-name/0b/4977827a98a917cba35061750da58d.png" width="65" height="42"/>=<img src="//img1.yqda.net/question-name/11/257d9228fe01fb0260dc488ebf1e01.png" width="65" height="42"/>
- C.5<img src="//img1.yqda.net/question-name/43/acfcfeee4abb09a04938e4119f5adb.png" width="77" height="42"/>
- D.<img src="//img1.yqda.net/question-name/bb/da7b18b0c87158c782bad6f7e35d77.png" width="203" height="42"/>
- A.<img src="//img1.yqda.net/question-name/49/d548568b652354e61921d1df0317a7.png" width="68" height="62"/>
- B.<img src="//img1.yqda.net/question-name/ca/7fe9f45b479636321e564db83266b8.png" width="68" height="62"/>
- C.<img src="//img1.yqda.net/question-name/60/1e92a2e6fe0e3661c9de99416acb5e.png" width="68" height="62"/>
- D.<img src="//img1.yqda.net/question-name/ff/47dbaf02f2037bba72826a1b2f8f1e.png" width="68" height="62"/>
