已知
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f4fac6f8f68051a1dc1af39e94979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
A.8 | B.![]() | C.![]() ![]() | D.2或![]() |
19-20七年级上·浙江杭州·期末 查看更多[2]
更新时间:2020-04-06 14:42:20
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【推荐1】把夏禹时代的“洛书”用现代数学符号翻译出来就是一个三阶幻方,其实际数学意义就是它的每行、每列、每条对角线上三个数之和均相等,则幻方中a的值是 ( )
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462675757113344/2463479280533504/STEM/f61b1fec-ecdf-4183-b95a-8cadd3f2f29e.png)
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A.6 | B.12 | C.18 | D.24 |
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单选题
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适中
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名校
【推荐2】已知
,
,
,则
的值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b05cf2746c4450c4b99d765bd37170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b178398b8a3b6ca1a98538af1f316987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3863bf7b826b025095f9b147e2514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
A.-7 | B.-3 | C.-7或-3 | D.±7或±3 |
您最近一年使用:0次