Mathematics
Junior High
Resolved
∅は{}しなくてもいいんですか?
逆にしてもいいですか?
(2) A={2, 3, 5, 8), B={1, 4, 6}
ハ Tの
*7
1,
(2) ANB=D,
(つ) A0p-1
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ありがとうございます