[微積] 兩題微積分
看板trans_math作者dreamingaway (Wherever I May Roam)時間13年前 (2010/12/30 18:59)推噓5(5推 0噓 13→)留言18則, 3人參與討論串1/3 (看更多)
※ [本文轉錄自 Math 看板 #1D76MNSW ]
作者: dreamingaway (Wherever I May Roam) 看板: Math
標題: [微積] 兩題微積分
時間: Thu Dec 30 18:57:24 2010
1. Define a function f:R→R by f(x)=0 if x belongs to R\Q,
and f(x)=1/p if x=q/p where p,q belong to Z, p≧1 and gcd{p,q}=1.
Show that lim f(x)=0
x→1/2
2. Let f,g:[0,1]→R, be continuous functions. Define h(x)=max{f(x),g(x)}
for all x belong to [0,1]. Show that h(x) is also a continuous function.
請問這2題要怎麼做 謝謝
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12/30 19:43, , 1F
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12/30 19:46, , 7F
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12/30 19:46, , 8F
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12/31 00:58, , 9F
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12/31 01:00, , 11F
12/31 01:00, 11F
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12/31 01:08, , 12F
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12/31 01:14, , 13F
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12/31 16:40, , 14F
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12/31 16:40, , 15F
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12/31 16:47, , 16F
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12/31 16:47, , 17F
12/31 16:47, 17F
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12/31 16:48, , 18F
12/31 16:48, 18F
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