kk5032019 2021-4-23 11:06
證明
[ a b c
(a^2) (b^2) (c^2)
bc ac ab ]
=(a-b)(b-c)(c-a)(ab+bc+ca) ?
top11 2021-4-23 23:51
[quote]原帖由 [i]kk5032019[/i] 於 2021-4-23 11:06 AM 發表 [url=https://www.discuss.com.hk/redirect.php?goto=findpost&pid=534495034&ptid=29842030][img]https://www.discuss.com.hk/images/common/back.gif[/img][/url]
證明
[ a b c
(a^2) (b^2) (c^2)
bc ac ab ]
=(a-b)(b-c)(c-a)(ab+bc+ca) ? [/quote]
咁做如何？
[attach]12284453[/attach]