[計量] if y is a two-digit number...

看板GRE作者時間16年前 (2009/05/05 22:41), 編輯推噓7(7推 0噓 6→)
留言13則, 4人參與, 最新討論串1/1
if y is a two digit number with tens digit t and unit u and the table above is a multiplication table for t and u ( for example t*u = b) y^2 = ?? x t u t a b u b c <--table Ans y^2 = 100a + 20b + c 請教一下各位 解答寫 t^2 = a, u^2 = c 這是怎麼看出來的 謝謝 -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.64.156.172 ※ 編輯: think12381 來自: 61.64.156.172 (05/05 22:48)
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05/05 22:57, , 1F
直行橫列,就是交叉比對出來
05/05 22:57, 1F
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05/05 22:58, , 2F
t*t=a,u*t=b,u*u=c
05/05 22:58, 2F
推
05/05 23:07, , 3F
樓上正解
05/05 23:07, 3F
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05/08 11:33, , 4F
請問一下 ans y^2 = 11a + 20b + c 怎麼算出來的
05/08 11:33, 4F
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05/08 13:54, , 5F
打錯 是 y^2 = 100a + 20b + c 怎麼算的
05/08 13:54, 5F
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05/09 16:44, , 6F
你是看陳向東的數學那本嗎?不是有解說??
05/09 16:44, 6F
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05/09 16:45, , 7F
y 是兩位數,y=10t+u,y^2該會了吧
05/09 16:45, 7F
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03/15 13:35, , 8F
03/15 13:35, 8F
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03/15 13:36, , 9F
The truth I think is that we use different table
03/15 13:36, 9F
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03/15 13:36, , 10F
as foreigners, that's why we confused
03/15 13:36, 10F
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03/15 13:38, , 11F
I still don't know how the first floor figured o
03/15 13:38, 11F
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03/15 13:38, , 12F
ut the how the table works. But with the picture
03/15 13:38, 12F
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03/15 13:38, , 13F
i found, then I finally get it.
03/15 13:38, 13F
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