【单选题】
img src=zzximg/20190730/1564475140766082.png title=1564475140766082.png alt=图片78.png/的根式形式是( )
①
img src=zzximg/20190730/1564475169828406.png title=1564475169828406.png alt=图片79.png/
②
img src=zzximg/20190730/1564475177512856.png title=1564475177512856.png alt=图片80.png/
③
img src=zzximg/20190730/1564475183568179.png title=1564475183568179.png alt=图片81.png/
④
img src=zzximg/20190730/1564475188199139.png title=1564475188199139.png alt=图片82.png/
【单选题】
已知向量<img src="20190809/1565318424536224.png" title="1565318424536224.png" alt="图片12.png"/>的长度为3,方向向东,向量<img src="20190809/1565318432803809.png" title="1565318432803809.png" alt="图片11.png"/>的长度为4,方向向北,则<img src="20190809/1565318416857876.png" title="1565318416857876.png" alt="图片10.png"/>等于( )
①
<img class="kfformula" src="20190809/1565318471610307.png" data-latex="5"/>
②
<img class="kfformula" src="20190809/1565318471807250.png" data-latex="7"/>
③
<img class="kfformula" src="20190809/1565318471275858.png" data-latex="11"/>
④
<img class="kfformula" src="20190809/1565318471551260.png" data-latex="\sqrt {73}"/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/0ABDF40E82E1E0086D61314CBC77E33E.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/21563BDE880F2C29D0580337B3F4435C.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/568DCAE9451A56F2AA4971EBD81A4B98.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C488D1F769A05CF30069131FF6BAAB8D.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/0F3F0493244A949D3A0BD60939D91D9A.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/672C370BB35B710A418E3D500E9EC2E6.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/CECE98386F1859806D8F10B0B343805D.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/178FCF9F8240F543E75731808780BC3F.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/ABF175860647D441D1CD8FA44526A9FD.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/4CD8D84707C095DA9423433F9A9DDC63.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E25E17DBCB632CE53195B4F9DEDAB8C4.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/F0E857790FE7E5802B3C3ED944582F18.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/CE6F13652F621798B1A2C32C759A402C.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/3AAA30E033A5A14230A716FFD0D33BA1.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A6D6B412EC6398FB16E6630F7F223435.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/6DFB6181172EB11606E84D533852EEE1.png title=6.png alt=6.png/>
【单选题】
<img src="20190730/1564475370927962.png" title="1564475370927962.png" alt="图片83.png"/>等于()
①
<img class="kfformula" src="20190730/1564475500417727.png" data-latex="-\frac {1} {5}" width="95" height="53"/>
②
<img class="kfformula" src="20190730/1564475432374250.png" data-latex="5"/>
③
<img class="kfformula" src="20190730/1564475432591960.png" data-latex="\frac {1} {5}" width="66" height="53"/>
④
<img class="kfformula" src="20190730/1564475432400386.png" data-latex="-5"/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/AB1DAFF5807E8E1924BCB09C8D24F41F.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/6627DBD5AEE58AB550482552C57F8D19.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/38FB1BFD16DC9A14339993869B0F59B2.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/3C44408B0F34F43005286114E9470E24.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/0DBCB6F5DE293ED097A2F743020FF72A.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/1BF641E696DBA832C5C91C6F1F12F768.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/6DB8CF8C53D28AC9085BFA38FC16EF32.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/98762981CE7CFE2BE5F3180DE1E9CA61.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/ACCF31879A8EFB2197E60F2424A6D7F4.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/632ADE489105A836822454B4CD22A0F9.png title=6-4.png alt=6-4.png/>
【单选题】
若<img src="20190808/1565257310871188.png" title="1565257310871188.png" alt="图片120.png"/>,则<img src="20190808/1565257320203294.png" title="1565257320203294.png" alt="图片121.png"/>为( )