三分正方形 - 拼圖
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By Ingrid
at 2010-06-16T16:10
at 2010-06-16T16:10
Table of Contents
如圖所示:一塊長寬各1m的木板版分成3塊,AB為等腰梯形,A=B=1/3 m^2
┌----------┐
|\ A /|
| \ / |
| \____/ |
| |
| ____ |
| / \ |
| / \ |
|/ B \|
└----------┘
令上底為X(X<1),下底為1,高為H
Q1:請寫出H的範圍
Q2:當X=H,且能寫成 (根號W)/X - Y/Z,WXYZ均為正整數,求 W+X+Y+Z的最小值
Q3:若X & H都能寫成 a/b & c/d 的形式,且a,b,c,d均為正整數
gcd(a,b)=gcd(c,d)=1
當a=c,求a*b*c*d的最小值
Q4:同Q3,條件改成 b=d
雖然這題目可能沒人會看了,不過為了Q1,Q3,Q4,還是定義出等腰梯形~
Wiki寫的東西有時僅供參考吧...
--
"奧坎氏簡化論" -- "解決問題最好的方法 ; 幾乎總是最簡單的方法 "
1.我們離財富自由 , 只差一個好構想 , 及一個 "關鍵人物"
2.實際上,你開始的時候只需要三種資源 : 好點子 , 實現好點子的決心 ,
和擁有其他所有資源的重要人脈.
你應該奉行這個座右銘 :我現在需要的每一種有形或無形資產 ,
都掌握在某個地方的某些人手裡 , 我要如何找到這些人 , 說服他們提供我這些資源 ?
--
┌----------┐
|\ A /|
| \ / |
| \____/ |
| |
| ____ |
| / \ |
| / \ |
|/ B \|
└----------┘
令上底為X(X<1),下底為1,高為H
Q1:請寫出H的範圍
Q2:當X=H,且能寫成 (根號W)/X - Y/Z,WXYZ均為正整數,求 W+X+Y+Z的最小值
Q3:若X & H都能寫成 a/b & c/d 的形式,且a,b,c,d均為正整數
gcd(a,b)=gcd(c,d)=1
當a=c,求a*b*c*d的最小值
Q4:同Q3,條件改成 b=d
雖然這題目可能沒人會看了,不過為了Q1,Q3,Q4,還是定義出等腰梯形~
Wiki寫的東西有時僅供參考吧...
--
"奧坎氏簡化論" -- "解決問題最好的方法 ; 幾乎總是最簡單的方法 "
1.我們離財富自由 , 只差一個好構想 , 及一個 "關鍵人物"
2.實際上,你開始的時候只需要三種資源 : 好點子 , 實現好點子的決心 ,
和擁有其他所有資源的重要人脈.
你應該奉行這個座右銘 :我現在需要的每一種有形或無形資產 ,
都掌握在某個地方的某些人手裡 , 我要如何找到這些人 , 說服他們提供我這些資源 ?
--
Tags:
拼圖
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