數字比大小的理論或證明??
國中學生問了我 -1為什麼大於-2 ?
我當下無法明確回答,任何實數的比大小,這應該要用數論來證明嗎?或者只是定義問題
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推
12/18 15:28, , 1F
12/18 15:28, 1F
推
12/18 16:40, , 2F
12/18 16:40, 2F
推
12/18 18:23, , 3F
12/18 18:23, 3F
感謝樓上各位大大的回答,不過數線好像是畫出來的,分數也是在應用上才會比的??
※ 編輯: ranlong (1.163.178.230), 12/18/2015 18:37:49
→
12/18 18:41, , 4F
12/18 18:41, 4F
→
12/18 18:52, , 5F
12/18 18:52, 5F
→
12/18 18:52, , 6F
12/18 18:52, 6F
→
12/18 18:53, , 7F
12/18 18:53, 7F
→
12/18 18:54, , 8F
12/18 18:54, 8F
推
12/18 19:52, , 9F
12/18 19:52, 9F
→
12/18 19:52, , 10F
12/18 19:52, 10F
→
12/18 19:53, , 11F
12/18 19:53, 11F
→
12/18 19:55, , 12F
12/18 19:55, 12F
→
12/18 20:00, , 13F
12/18 20:00, 13F
→
12/18 20:01, , 14F
12/18 20:01, 14F
→
12/18 20:03, , 15F
12/18 20:03, 15F
的確,跟國中生用數線是很好的解釋方式~ 感謝大家的幫忙。特別感謝desperato,上次
也幫我解決想好久的題目!!
※ 編輯: ranlong (1.163.178.230), 12/18/2015 23:37:06
→
12/18 23:46, , 16F
12/18 23:46, 16F
→
12/19 02:05, , 17F
12/19 02:05, 17F
→
12/20 00:10, , 18F
12/20 00:10, 18F
→
12/20 00:10, , 19F
12/20 00:10, 19F
→
12/20 00:10, , 20F
12/20 00:10, 20F
推
12/20 01:08, , 21F
12/20 01:08, 21F
→
12/20 01:10, , 22F
12/20 01:10, 22F
→
12/20 01:10, , 23F
12/20 01:10, 23F
→
12/20 01:11, , 24F
12/20 01:11, 24F
→
12/20 01:14, , 25F
12/20 01:14, 25F
→
12/20 01:15, , 26F
12/20 01:15, 26F
感謝大家的討論,還有D大的精闢解析!!
※ 編輯: ranlong (1.161.233.149), 12/20/2015 14:36:31