

999
真sm.......咁簡單都
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原帖由 DarkNess_wTc 於 2009-6-26 20:03 發表
Prove that
(1-x)^6=(x-1)^6
consider
(1-x)^6
= [-1(x-1)]^6
=1.(x-1)^6
=RHS
所以(1-x)^6=(x-1)^6 ...


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