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【OG20-P288-395题】
Kim and Sue each bought some roses and some daisies at the prices shown above. If Kim bought the same total number of roses and daisies as Sue, was the price of Kim’s purchase of roses and daisies higher than the price of Sue’s purchase of roses and daisies?
(1) Kim bought twice as many daisies as roses.
(2) Kim bought 4 more roses than Sue bought.
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1 不知道Sue买的花的比例 无法比较 2 设Kim和Sue分别买了a枝花 ROSE kim——x+4 sue——x DAISY kim——a-(x+4) sue——a-x KIM: 1*(x+4)+0.5*(a-x-4)=0.5x+0.5a+2 SUE: 1*x+0.5*(a-x)=0.5x+0.5a 可见 KIM一定大于SUE ——2单独S
题目讨论 (6条评论)

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Crystal8
买的花总数一样,玫瑰更贵,所以只要谁买的玫瑰更多,谁花的钱就更多
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0 回复 2021-11-22 17:04:42
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贾思敏
又是一道套娃题,我也掉坑了,直接选了C,妈的,真的要仔细看! Kim's Roses:X1, Kim's Daisies:Y1 Sue's Rose:X2, Sue's Daisies:Y2 题干:X1+Y1=X2+Y2,问X1+0.5Y1大于X2+0.5Y2吗? 条件一:Y1=2X1,但未知X2和Y2是多少,没办法比较,不充分 条件二:X1=X2+4 设X1+Y1=X2+Y2=a,所以Y1=a-(4+X2)=a-4-X2 所以Kim总共花了X1+0.5*Y1=4+X2+0.5(a-4-X2)=4+X2+0.5a-2-0.5*X2=0.5*X2+0.5a+2 Sue总共花了X2+0.5*Y2=X2+0.5(a-X2)=X2+0.5a-0.5*X2=0.5*X2+0.5a 综上,Kim总共花了0.5*X2+0.5a+2 Sue总共花了0.5*X2+0.5a Kim比Sue多花了2,充分
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0 回复 2021-09-25 16:45:39
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你这只猪
做题的时候脑袋瓦塔了么,真的是
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0 回复 2020-06-08 14:32:58
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babyweezy
1 只讲了kim,没有讲sue,所以无法比较。
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0 回复 2019-09-08 10:24:18
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石头人
1 不知道Sue买的花的比例 无法比较 2 设Kim和Sue分别买了a枝花 ROSE kim——x+4 sue——x DAISY kim——a-(x+4) sue——a-x KIM: 1*(x+4)+0.5*(a-x-4)=0.5x+0.5a+2 SUE: 1*x+0.5*(a-x)=0.5x+0.5a 可见 KIM一定大于SUE ——2单独S
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0 回复 2018-08-04 12:10:00
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斑马斑马斑马
let kim : a roses, and b daisies, Sue: c roses, d daisies
a+b=c+d in (2) a-c=4, a=4+c. 4+c+b=c+d then we can get 4+b=d, b=d-4
then 4+c+d-4=c+d>>> 4+c+0.5*(d-4)=c+0.5d>>>>we can get the equation =2, 2>0, suff
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0 回复 2017-12-31 11:35:52