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作者 chuo 在 PTT [ Math ] 看板的留言(推文), 共185則

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[中學] 請問一題國中數學

[ Math ]4 留言, 推噓總分: +2

作者: steven0511 - 發表於 2018/11/18 22:09(5年前)

2^F推chuo: 培英國中去年考古題XD11/18 23:14

[其他] 2018 費爾茲獎二三事

[ Math ]37 留言, 推噓總分: +32

作者: Giawgwan - 發表於 2018/08/06 18:40(5年前)

1^F推chuo: 是教官！頭推！08/06 18:51

[幾何] 資優班考試證明請教

[ Math ]5 留言, 推噓總分: +1

作者: fivechess - 發表於 2017/07/18 02:05(6年前)

1^F推chuo: 應該用三次兩邊和大於第三邊即可。07/18 02:43

2^F→chuo: AB+BD > AD AC+CD > AD 相加得到周長>2AD07/18 02:43

3^F→chuo: 同理周長>2BE 周長大於2CF07/18 02:44

4^F→chuo: 再相加即可07/18 02:44

[中學] 競賽試題四題

[ Math ]40 留言, 推噓總分: +5

作者: Inciter49 - 發表於 2016/08/24 00:02(7年前)

1^F推chuo: 5*3*3=4508/24 00:10

2^F→chuo: 第九題記得答案是5/208/24 00:10

3^F→chuo: 第六題把BD連起來會是直角所以可以算出全部的面積08/24 00:11

4^F→chuo: 然後算出BC 再用比例算出BE08/24 00:12

[幾何] 畫圈圈小遊戲

[ Math ]11 留言, 推噓總分: +5

作者: dog2005xx - 發表於 2016/05/30 15:45(8年前)

4^F推chuo: 搜尋：拈05/30 18:52

[中學] 一題國二數學(一元二次方程式)

[ Math ]7 留言, 推噓總分: +2

作者: imaft - 發表於 2016/01/13 20:30(8年前)

3^F推chuo: 同意樓上，這方法不好嗎XD01/13 21:23

[中學] 因式分解..卡住了...求解>"<

[ Math ]9 留言, 推噓總分: +1

作者: altosax1301 - 發表於 2015/11/22 00:59(8年前)

1^F推chuo: (x+1)(3x-1)*(2x+1)(4x-1)-36x^4 應該吧XD11/22 01:13

2^F→chuo: (3x^2+2x-1)(8x^2+2x-1)-36x^411/22 01:13

3^F→chuo: (3x^2+ A )(8x^2+ A )-36x^4 (令2x-1=A)11/22 01:14

4^F→chuo: 24x^4 +11Ax^2 + A^2 -36x^411/22 01:14

6^F→chuo: A^2 + 11Ax^2 - 12x^411/22 01:15

7^F→chuo: (A+12x^2)(A-x^2) 再把A代回去11/22 01:15

8^F→chuo: 再來就不寫了XDD11/22 01:15

[中學] 國中資優入學考題

[ Math ]8 留言, 推噓總分: +1

作者: chuo - 發表於 2015/06/18 19:47(9年前)

8^F→chuo: ps.問到答案了我修改原文06/18 20:06

9^F→chuo: 回一樓版友我再確認一下是不是資優班題06/18 20:10

10^F→chuo: 是新竹六家國中可是我沒印象那邊有資優班06/18 20:10

11^F→chuo: 所以不確定是入學考題或是校內競賽試題...等06/18 20:11

12^F→chuo: 確認後會再推文告知06/18 20:11

13^F→chuo: 是暑假作業囧....太有事了06/18 20:41

[中學] 兩正方形重疊，面積恆為一定值。

[ Math ]1 留言, 推噓總分: +1

作者: hua825 - 發表於 2015/05/15 21:38(9年前)

1^F推chuo: 從中心往邊上畫兩個垂直線段證明兩三角形全等05/15 21:46

[中學] 2n，3n，6n的因數個數關係

[ Math ]6 留言, 推噓總分: +1

作者: sunfin - 發表於 2015/03/31 22:17(9年前)

3^F→chuo: 是今年實驗科學班試題嗎XD03/31 23:32

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