已知:
,
求:(1)
(2)求当
时,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5284486f23267c8b18e3e4ef643ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d90b99e1ac47ff4ec12fa888b726705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47495754f75c03b9019cbaa0ff5d441f.png)
求:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16133a7aac1613f7867ecdf35c4eaff2.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ffc12c0f0e4be8074472571c9079cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16133a7aac1613f7867ecdf35c4eaff2.png)
更新时间:2019-11-02 10:31:12
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解答题-计算题
|
适中
(0.65)
【推荐2】计算与化简:
(1)-12020×|-
|+(3.14-π)0-2
;
(2)20202-2019×2021(用乘法公式计算);
(3)(2x)3·(-5xy2)÷(-2x2y)2;
(4)(x+2y-3)(x-2y+3).
(1)-12020×|-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76d884313a7cbe01143777c34bc9382.png)
(2)20202-2019×2021(用乘法公式计算);
(3)(2x)3·(-5xy2)÷(-2x2y)2;
(4)(x+2y-3)(x-2y+3).
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