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复数的乘法交换律
魔法绿骑士
准尉 十一级
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Floor 1 Posted at: 4/9/11 18:16
(1,2)(3,4)=(1x3-2x4,2x3+1x4)=(3-8,6+4)=(-5,10)=5(-1,2)

(3,4)(1,2)=(3x1-4x2,4x1+3x2)=(3-8,4+6)=(-5,10)=5(-1,2)

所以复数也有乘法交换律

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Clicks: 1547 Replies: 0
Author: 魔法绿骑士
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Last reply time: 4/9/11 18:16
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