Re: [問題] 幾題計量問題請教
※ 引述《dolabmon ()》之銘言：
: 幾題計量問題希望大大能幫小弟解惑
: 前兩題是比較大小
: 圖片我用拍的
: http://dolabmon.imgur.com/gre
圖片1
P = 4* (X^2 + y^2) 故 左右相等 (c)
圖片2
任一多邊形的外角和為360 所以X=120, Y=90 故 左右相等 (c)
: 接著是
: 1. How many positive integers less than 20 are equal to the sum of a
: positive multiple of 3 and a positive multiple of 4.
小於20的正整數中 可以為 (3倍數+4倍數) 的有多少
最小為7
後面依此類推得到 10,11,13,14,15,16,17,18,19 共10個
: 2. Two tanks, X ans Y, are filled to capacity with jet fuel. Tank X holds
: 600 gallons more than tank Y. If 100 gallons of fuel were to be pumped
: from each tank, tank X would then 3 times as much fuel as tank Y. What
: is the total number of gallons of fuel in the two full tanks?
x = y+600
x- 100 = 3(y-100)
解為 x=1000, y=400
故答案為 1400
: 感謝 <(_ _)>
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10/09 00:31, , 1F
10/09 00:31, 1F
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