化简:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31159b3648d73f097ef086cde0e63745.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2358a0f943ed10c1bc11c28fb89802.png)
更新时间:2023-11-06 16:07:43
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解答题-计算题
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适中
(0.65)
【推荐2】(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9213e02204179c20fd4f4426880340b4.png)
(2)解不等式组:
,并写出它的所有负整数解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9213e02204179c20fd4f4426880340b4.png)
(2)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518e1d83730d84e0339dc439083b6b5a.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,在正方形ABCD中,E、F分别为边AB、BC的中点,连接AF、DE交于点G,连结BG.
![](https://img.xkw.com/dksih/QBM/2022/8/9/3040826393247744/3074133296357376/STEM/6217fb1ef68e446aa19811c59d7806d0.png?resizew=157)
(1)试判断AF与DE的数量关系与位置关系,并证明.
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![](https://img.xkw.com/dksih/QBM/2022/8/9/3040826393247744/3074133296357376/STEM/6217fb1ef68e446aa19811c59d7806d0.png?resizew=157)
(1)试判断AF与DE的数量关系与位置关系,并证明.
(2)求证:BG平分∠EGF.
您最近一年使用:0次