Re: [計量]想請問三題PP3的數學題

看板GRE (GRE入學考試)作者 (冰火五重天)時間17年前 (2007/04/30 22:52), 編輯推噓2(200)
留言2則, 1人參與, 最新討論串2/2 (看更多)
※ 引述《nukchichi (haha)》之銘言: : 不好意思~想問三題pp3的計量題~~想了很久...還是解不出來~~ : 照片上的答案是對的~~ : 1.湯的比例大小問題 : http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998970&p=0 假設 Soup T裡面的saturated fat=X, polyunsaturated fat=Y, 則 Soup S 裡面的 saturated fat= X-2, polyunsaturated fat=Y-2. 題目中已經告訴你兩種湯都 含有這兩種成分,所以X>0,Y>0,X-2>0,Y-2>0。=而saturated fat大於 polyunsaturated fat,所以X>Y。 (X-2)/(Y-2) - X/Y=[ (X-2)Y -(Y-2)X ]/ [Y(Y-2)]=[2(X-Y)]/[Y(Y-2)] >0 : 2.客人人數問題 : http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998971&p=1 假設客人有X人,X/3 + X/4 + X/6 = 36 4X + 3X + 2X = 12*36 9X = 12*36 X= 12*4=48 : 3.圖形問題 : http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998972&p=2 (a) 20-year-old male ~1.9 million people. 20*1.9=38 (b) 20-year-old female ~1.9 million people. 20*1.9=38 (c) 60-year-old male ~1.1 million people. 60*1.1=66 (d) 60-year-old female ~1.2 million people. 60*1.2=72 <---greatest (e) 80-year-old female ~0.5 million people. 80*0.5=40 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 63.246.176.158

04/30 23:09, , 1F
謝謝嚕!第二題看來我會錯意了>"<
04/30 23:09, 1F

05/01 11:36, , 2F
謝嚕!!我搞懂了the sum of the ages = =
05/01 11:36, 2F
文章代碼(AID): #16DWAM5H (GRE)
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文章代碼(AID): #16DWAM5H (GRE)