精華區beta studyabroad 關於我們 聯絡資訊
以下幾題是很白痴的問題,我只是想確定考古題的答案是否有問題, 以釐清我的迷思,若大家沒空就不要理,若有人回應我我會非常感謝!! 1. (3/7+2/7) 與 1 比較誰大,答案是(a),應該是錯了吧? 2. A_____________B |\ u/| | \ / | | \ / | | \ / | | \ / | | \t/ | | s\ | | / \ | | / \ | | / \ | | / \ | |r/ \w| |/__________v\| D C r, s, t, u, v, w都是角度,ABCD是矩形 AC與BD是對角線,請問(r+u+v)與(r+u+v+w)誰大 答案居然是(c)一樣大,是否也錯了? 3. When it was found that 150 more tickets for the school play were sold than the seating capacity of the auditorium. It was decided to have two performances. If the total number of tickets sold was equal to the total number who attended and if the auditorium was 2/3 full for each of the two performances, what is the seating capacity of the auditorium? 答案是450,可是我怎麼覺得應該的答案是300? 4. Q / \ / \ / \ X/_______\Y / /\ /________/__\ P Z R 如圖,XQY與ZYR都是等腰三角形,ZR:PR=1:4, 問(the perimeter of XQY)與 (the perimeter of parallelogram PXYZ)誰大, 答案是(a),可是我怎麼覺得應該是無法估計? 5. n r s t --- + --- = --- + --- 4 8 8 6 , n, r, s, and t are positive integers. 請問(2n+r)與(2s+t)誰大,答案是(a) 我依舊覺得應該是無法估計? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.56.13.67 ※ 編輯: boddy 來自: 203.203.44.29 (09/28 00:24) > -------------------------------------------------------------------------- < 作者: shiningstar (If) 看板: studyabroad 標題: Re: [問題] 幾題re計量想請教是否答案有問題 時間: Wed Sep 28 10:42:04 2005 ※ 引述《boddy (GOGOGO)》之銘言: : 以下幾題是很白痴的問題,我只是想確定考古題的答案是否有問題, : 以釐清我的迷思,若大家沒空就不要理,若有人回應我我會非常感謝!! : 1. (3/7+2/7) 與 1 比較誰大,答案是(a),應該是錯了吧? 題目沒錯的話,答案的確應該是 b : 2. A_____________B : |\ u/| : | \ / | : | \ / | : | \ / | : | \ / | : | \t/ | : | s\ | : | / \ | : | / \ | : | / \ | : | / \ | : |r/ \w| : |/__________v\| : D C r, s, t, u, v, w都是角度,ABCD是矩形 : AC與BD是對角線,請問(r+u+v)與(r+u+v+w)誰大 : 答案居然是(c)一樣大,是否也錯了? 除非w沒角度,不然一定是後者比較大啊 這題目設計的好怪?! : 3. When it was found that 150 more tickets for the school play were : sold than the seating capacity of the auditorium. It was decided to : have two performances. If the total number of tickets sold was equal : to the total number who attended and if the auditorium was 2/3 : full for each of the two performances, what is the seating capacity : of the auditorium? : 答案是450,可是我怎麼覺得應該的答案是300? 令 C = capacity of the auditorium (C + 150)/2 = 2/3*C 1/3 * C = 150 故 C = 450 : 4. Q : / \ : / \ : / \ : X/_______\Y : / /\ : /________/__\ : P Z R : 如圖,XQY與ZYR都是等腰三角形,ZR:PR=1:4, : 問(the perimeter of XQY)與 : (the perimeter of parallelogram PXYZ)誰大, : 答案是(a),可是我怎麼覺得應該是無法估計? 這題我解不出來,我也會判斷是無法估計 我只能解到 QX = QY = 3XP = 3YZ XQY的周長: QX + QY + XY = 6XP +XY PXYZ的周長:2XP + 2XY 兩式的差異 變成 4XP 和 XY 這兩個不曉得誰大誰小啊 ~ 始終判斷不出角度PQR的度數 >_< : 5. n r s t : --- + --- = --- + --- : 4 8 8 6 , n, r, s, and t are positive integers. : 請問(2n+r)與(2s+t)誰大,答案是(a) : 我依舊覺得應該是無法估計? 這題我也覺得是無法估計 我採舉例法。 首先式子通乘 24 變成 6n + 3r = 3s + 4t 例子1 : 假設 n = 2, r = 1 , s = 1 , t = 3 5 = (2n+r) = (2s+t) = 5 例子2 : 假設 n = 2 , r = 5 , s = 1 , t = 6 9 = (2n+r) > (2s+t) = 8 所以無法判定 不過舉例法都比較耗時就是了 :P (通常這種變數太多的,都直接先拼無法判定,等有時間再來舉證,純屬個人習慣) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.228.222.249