There are currently 5 posts.
四次根号-1又是多少呢
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rt
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开四次方还是用根号用四次？
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Floor 3
125.67.191.*
5/7/11 20:31
开四次方
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回复：3楼 √2 /2*(1+i)这是-1开四次方的主值 除此以外还有-√2 /2*(1+i)和±√2 /2*(1-i) |
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Floor 5
183.213.56.*
7/10/15 10:33
j或k或-j或-k
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