※ 引述《landy6320 (landy)》之銘言： : prep DS1-169 : 169. 16735-!-item-!-187;#058&010875 : If the integers a and n are greater than 1 and the product of the first 8 positive integers is a multiple of an, what is the value of a ? : (1) an = 64 : (2) n = 6 : 如何得知(2)的2^6會等於64 從(2)中你怎麼會知道a等於2呢?prep DS2-60 你題目抄錯了 害我看半天 呵呵 應該是a^n 因為已知n=6, 8!中 可以提出一個factor剛好是2^6 所以a=2 : 60. 4972-!-item-!-187;#058&004074 : Does the integer k have a factor p such that 1 < p < k ? : (1) k > 4! k > 1*2*3*4 但是沒說k等於多少 萬一k為質數 就不會有大於1且小於k的因數 : (2) 13! + 2 k 13! + 13 : 不懂(2)為什麼可以得知 這題想秒殺的話 就先不管13!是多少 假設13!得出的結果是偶數 13! + 2還是偶數 這時至少會有個因數p=2 假設13!是奇數 13! +13會是偶數 至少也會有個因數p=2 : CR PREP-2 42 : 42. (32943-!-item-!-188;#058&007554) : Researchers have found that when very overweight people, who tend to : have relatively low metabolic rates, lose weight primarily through dieting, : their metabolisms generally remain unchanged. They will thus burn : significantly fewer calories at the new weight than do people whose : weight is normally at that level. Such newly thin persons will, therefore, : ultimately regain weight until their body size again matches their metabolic : rate 我試著解釋看看 學者發現 過重的人代謝率也比較低 他們要靠節食來減重的話 代謝率會維持不變 就算他們瘦身成功了 他們燃燒的卡路里比起一般人少 所以這些瘦身成功的人 會再度變胖 直到符合他們代謝率水準的程度 : The conclusion of the argument above depends on which of the following : assumptions? : (A) Relatively few very overweight people who have dieted down to a new : weight tend to continue to consume substantially fewer calories than : do people whose normal weight is at that level. 減肥成功的胖子很少持續吃較少的卡路里 : (B) The metabolisms of people who are usually not overweight are much more : able to vary than the metabolisms of people who have been very : overweight. 體重正常的人 代謝率的變化比胖子大 : (C) The amount of calories that a person usually burns in a day is determined : more by the amount that is consumed that day than by the current weight : of the individual. 人們每天燃燒的卡路里多寡 比較是由他每天攝取的量來決定 而非他的體重來決定 : (D) Researchers have not yet determined whether the metabolic rates of : formerly very overweight individuals can be accelerated by means of : chemical agents. 學者尚未知道胖子的代謝率可藉由藥物來改變 : (E) Because of the constancy of their metabolic rates, people who are at : their usual weight normally have as much difficulty gaining weight as : they do losing it. 因為代謝率是穩定的 體重正常的人要增重比減重困難 答案應該是A吧 因為題目的結果就是胖子會復胖成跟他原本就很低的代謝率相符的水準 表示很少會有胖子能持續吃很少 所以就復胖了 : 覺得題目好繞喔 看不太懂他的意思 不知道他要問什麼 : 拜託哪位牛人趕快解救我吧 拜託拜託 謝謝! -- No doubt, just keep walking --

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