计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc5a4d8b30247acdbc008b98c9093ea.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc5a4d8b30247acdbc008b98c9093ea.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfe1834bd70f5e0aa574f884b966f95.png)
更新时间:2022-12-04 09:59:28
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解答题-问答题
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较易
(0.85)
【推荐2】小明同学做一道数学题,已知两个多项式A、B,其中
,在求
时,他把
误看成
,结果求出的答案为
.
(1)请你替他求出
的正确答案;
(2)小明同学发现,当
时,
的值是一个定值,请求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ab5278df32b185c6cae2e808e51f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc35652f7ec5db63ef54864b68fe68.png)
(1)请你替他求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
(2)小明同学发现,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a31f0e2f05bbef9aedc1b8bde981a6.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】数学上,我们把
称作二阶行列式,规定它的运算法则为
,例
,请根据阅读理解上述材料解答下列各题:
(1)
___________;
(2)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c6d3e41ae7555496a00e69cee2da8b.png)
(3)已知实数
满足行列式
,求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2969b2ffdf4b488198859e5d2ee5686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67eec057c30ac58b75b302525b0e134b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f15a7e2c6bbfd7ede260deec5e55d31.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867ba66f4da57fc88c5f9ed06d562187.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c6d3e41ae7555496a00e69cee2da8b.png)
(3)已知实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d701d16d9f318ee8fa779f5b961d64c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4db53d8d32f94053b3a755b528db81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb14bc4f29beca50959d6c5db426e40.png)
您最近一年使用:0次