已知矩阵
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e54d782c4f5ac398acccfbd1ce3ff4.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea29a03c1010dd728e933331abd062b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d024f0fc7981e44ec6070963f9e5499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e54d782c4f5ac398acccfbd1ce3ff4.png)
更新时间:2020-06-26 10:43:27
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【推荐2】已知函数
,在7行7列的矩阵
中,
,则这个矩阵中所有数之和为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c031ffb791dee52ca53fec7ece0730c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3a25e36e9b17c8cf2e926a50476fee.png)
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