[中學] 集合問題
S = {1,1,2,2,3,3} 跟 S = {1,2,3} 是相等的,
但是如果相等的話那不是寫後面那樣就好了嗎??
還是說同一元素寫兩次有不同的意義??
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推
07/18 17:17, , 1F
07/18 17:17, 1F
→
07/18 17:18, , 2F
07/18 17:18, 2F
推
07/18 17:18, , 3F
07/18 17:18, 3F
→
07/18 17:19, , 4F
07/18 17:19, 4F
→
07/18 17:42, , 5F
07/18 17:42, 5F
→
07/18 17:42, , 6F
07/18 17:42, 6F
推
07/18 18:17, , 7F
07/18 18:17, 7F
→
07/18 18:17, , 8F
07/18 18:17, 8F
推
07/18 23:23, , 9F
07/18 23:23, 9F
→
07/18 23:24, , 10F
07/18 23:24, 10F
→
07/18 23:25, , 11F
07/18 23:25, 11F
→
07/18 23:26, , 12F
07/18 23:26, 12F
→
07/18 23:26, , 13F
07/18 23:26, 13F
→
07/18 23:27, , 14F
07/18 23:27, 14F
→
07/19 01:47, , 15F
07/19 01:47, 15F
→
08/13 16:59, , 16F
08/13 16:59, 16F
→
09/17 14:54, , 17F
09/17 14:54, 17F
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