Re: [計量] 請教幾題~"~

看板GRE (GRE入學考試)作者CCWck (幹嘛要暱稱)時間18年前 (2008/05/20 21:45)推噓5(5推 0噓 8→)

留言13則, 3人參與討論串2/4 (看更多)

※ 引述《butini (hackneyed)》之銘言： : #1 : 5. If [x] reprents the greatest integer less than or equal to x, : what is the solution to the equation 1 - 2[x]=-3 : (a)x=2 : (b)2<= x <3 : (c)2<x<=3 : (d)2<x<3 : (e)there is no solution Ans:(e) : 這是說例如2.xx=3嗎還是2.xx=2? 恩應該是比x小的最大整數 [2.xx]=2 [2]=2 題目[x]=2 2<=x<3 這樣才對因為很直覺想到數學上常用的高斯符號所以搞反了^^" : 20. if a cube has an edge of length 10, then the length of the segement : connecting the center of a face of the cube to any vertex not contained : in the plane of that face is : (a) √6 (b)6√5 (c)5√6 (d)3√5 (e)10√6 Ans:c : **前面剛有人po過不過回文還是看不懂..冏邊長10的立方體某一面的中心到任何其他不同面的頂點的連線長度為多少先看這個點到"對面"得的中心長度為 10 對面的中心到對面的頂點長度為 10/√2 商高定理得到長度為 √[10^2 +(10/√2)^2 ] = 5√6 : 28.After the first term, each term in a sequence is 3 greater than 1/3 of : the preceding term. If t is the first term of the sequence and t≠0, what : is the ratio of the second term to the first term? : Ans:(t+9)/3t : 題目看不懂.. 3 greater than 1/3那邊 : #2 : 6. if the sum of the two number is 21, and the difference of their square : is 63, what is the greater of the two numbers? : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^問啥@@" : Ans:12 a+b=21 |a^2-b^2| = 63 問max(a.b) 計算後可得a b 為 12和9 : 8. For all real number, 6a-2, 3a, and a+2 are in arithemetic progression. : Column A: a+1 : Column B: 0 : Ans:A : 順便想問real number的定義為何?實數包含正整數負整數 and?? : 22. of the 120 people in a room, 3/5 are women, and 2/3 are mirried. : ^^這個and是說其中女性有2/3結婚 : 還是說120個裡面2/3結婚XD : Column A: the maximum number of women in the room who could be unmarried. : Column B: 72 : Ans:B 120中的2/3結婚是否女性不知道 : 28. the sum of the digis of a three-digit number is 16. : The tens digit of the number is 3 times the units digit, which is 1/4 : of the hundreds digit. : column A: the three-digit number : Column B: 800 : Ans:A : 有點多請見諒~"~ 有一個三位數三個數字加起來是16 十位數字是個位數字的3倍而這個各位數字是百位數字的1/4 計算可得 862 -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.113.13.127