首頁
題庫
網(wǎng)課
在線模考
桌面端
登錄
搜標(biāo)題
搜題干
搜選項(xiàng)
0
/ 200字
搜索
問答題
設(shè)α1=(1,2,0)T,α2=(1,a+2,-3a)T,α3=(-1,-b—2,a+2b)T,β=(1,3,-3)T,試討論當(dāng)a、b為何值時, (1)β不能由α1,α2,α3線性表示; (2)β可由α1,α2,α3唯一地線性表示,并求出表示式; (3)β可由α1,α2,α3線性表示,但表示式不唯一.
答案:
首先,我們需要考慮向量β是否能由向量組α1, α2, α3線性表示,這取決于向量組α1, α2, α3是否線性無關(guān)。如果...
點(diǎn)擊查看完整答案
手機(jī)看題
你可能感興趣的試題
單項(xiàng)選擇題
根據(jù)<消防監(jiān)督檢查規(guī)定>的規(guī)定,對單位遵守()的情況進(jìn)行消防監(jiān)督檢查。
A.消防規(guī)章
B.內(nèi)部消防制度
C.消防規(guī)范性文件
D.消防法規(guī)
點(diǎn)擊查看完整答案
手機(jī)看題
單項(xiàng)選擇題
聽力原文: I just wanted to say well done for getting that contract. You did a great job an
d we know it wasn’t easy. What would you say to a celebratory meal? I know a very good restaurant near here. I’m sure we could get a table for lunch if you’re free.—You will hear five recordings.
—For each recording, decide what the main reason is for the phone call.
—Write one letter (A—H) next to the number of the recording.
—Do not use any letter more than once.
—After you have listened once, replay each recording.
A booking a table
B cancelling a meeting
C placing an order
D selling something
E offering a lift
F congratulating someone
G checking an address
H making an appointment
點(diǎn)擊查看完整答案
手機(jī)看題
微信掃碼免費(fèi)搜題