Arrange aaac+abbb+bccc greater than or equal to aabc+acbb+abcc.
Aac(a-b)+abb(b-c)+bcc(c-a) is greater than or equal to 0.
Aac(a-b) is greater than or equal to 0, abb(b-c) is greater than or equal to 0, and bcc(c-a) is greater than or equal to 0.
So c is greater than 0, a is greater than 0, and b is greater than 0.
Supplementary note: aa (that is, A times A) must be a positive number, and abc cannot be 0, because they are denominators in the title.
Shen ran Cai Jing original
Author | Tang Yahua
Edit | Dawn
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