Re: [計量]想請問三題PP3的數學題
※ 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
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