先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479b0936c64c03d3b1715aa54803442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1225fd03e8e8730dac8487dae5387635.png)
更新时间:2024-05-14 12:43:14
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解答题-问答题
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【推荐1】若
,
,
(1)若
,求
的值.
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d38f3bef2d10ee488fb3423bbec4ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78866ea635f38545bca721b65af19884.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d50119da3185633303cd619d638fc69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
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解答题-计算题
|
较易
(0.85)
【推荐2】(1)计算:(5
﹣2
)÷(﹣
)×
;
(2)已知a=
+1,求代数式a2﹣2a+7的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c658b3137ff71c52c1ed3c854eedda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280e36eef811c4ef5056fe859d2cc896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ecaf9fe4eb0c06bf544187af8d51b0.png)
(2)已知a=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
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解答题-计算题
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较易
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【推荐2】计算题
(1)4a2b•(﹣ab2)3 (2)(3x﹣4y)(x+2y).
(1)4a2b•(﹣ab2)3 (2)(3x﹣4y)(x+2y).
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