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2009TRML

2009TRML

想請教一下第五題的做法

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2009TRML.zip (356.64 KB)

2014-1-4 07:32, 下載次數: 8521

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回復 1# yungju 的帖子

a3+b3=(a+b)(a2ab+b2)
a3+(ab)3=(2ab)[a2a(ab)+(ab)2]=(2ab)(a2ab+b2)
a3+b3a3+(ab)3=a+b2ab
名豈文章著官應老病休飄飄何所似Essential isolated singularity

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