(1)计算:-12+(-3)2
(2)一个角是它的余角的两倍,求这个角
(2)一个角是它的余角的两倍,求这个角
更新时间:2022-02-15 20:25:16
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【推荐1】现规定一种新的运算“*”:
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(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f573f0c877a5df69200abb5272fbb7.png)
(2)计算:
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(2)计算:
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【推荐1】如图,在
中
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【推荐2】如图,
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(2)求
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