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SecretMagic___'s profile
数弱なのに数学科になってしまった系女子
数弱なのに数学科になってしまった系女子
数弱なのに数学科になってしまった系女子
@SecretMagic___

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数弱なのに数学科になってしまった系女子

@SecretMagic___

東京
Joined September 2017

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    数弱なのに数学科になってしまった系女子‏ @SecretMagic___ 8h8 hours ago

    分かる方教えてくださいpic.twitter.com/fxujgAikVU

    5:36 PM - 10 Jul 2018
    • 3 Retweets
    • 10 Likes
    • チェン メイフィー@資格取るマン ( 。•̅_•̅。) 文化祭までにコンピューター将棋完成させたい和差積商++ アラビア語を毎日勉強して単位を取る予定のトム 計算 うさめです。@勉ヲタ系イケメン?子 加藤公一(はむかず) そらら
    5 replies 3 retweets 10 likes
      1. New conversation
      2. ゆきの‏ @sakura_ixa 8h8 hours ago
        Replying to @SecretMagic___

        ガウス記号使ってあげると出来ると思うpic.twitter.com/9EjdgDLWnH

        1 reply 0 retweets 1 like
      3. 数弱なのに数学科になってしまった系女子‏ @SecretMagic___ 6h6 hours ago
        Replying to @sakura_ixa

        解いてもらえますか??

        2 replies 0 retweets 0 likes
      4. ゆきの‏ @sakura_ixa 6h6 hours ago
        Replying to @SecretMagic___

        具体例を与えるだけなので、fの写像が答えになるんじゃないかな?^^::

        2 replies 0 retweets 1 like
      5. 数弱なのに数学科になってしまった系女子‏ @SecretMagic___ 6h6 hours ago
        Replying to @sakura_ixa

        やり直しになりました😭

        0 replies 0 retweets 0 likes
      6. End of conversation
      1. New conversation
      2. うさめです。@勉ヲタ系イケメン?子‏ @daigakujcjp 8h8 hours ago
        Replying to @SecretMagic___

        pic.twitter.com/PT0Oiobt6U

        1 reply 0 retweets 1 like
      3. 数弱なのに数学科になってしまった系女子‏ @SecretMagic___ 6h6 hours ago
        Replying to @daigakujcjp

        解いてもらえますか??

        0 replies 0 retweets 1 like
      4. End of conversation
      1. New conversation
      2. nevais‏ @nevais1 5h5 hours ago
        Replying to @SecretMagic___

        f(n) = ((2n-cos(nπ)+1)/4) e^(nπi)

        1 reply 0 retweets 1 like
      3. 数弱なのに数学科になってしまった系女子‏ @SecretMagic___ 4h4 hours ago
        Replying to @nevais1

        どういう計算で出ましたか??

        0 replies 0 retweets 0 likes
      4. End of conversation
      1. New conversation
      2. 高校数学問題bot‏ @HS_Math_bot 4h4 hours ago
        Replying to @SecretMagic___

        リプ欄を拝見してなんとなく事情を察しました 要はNとZが同型であることを示せばいいわけですが,これはNとZの間に全単射である写像が存在すればいいわけです この写像は一意に定まらず,つまり上記の写像を上手く1つ考えればいいことになります おそらくこの問題の趣旨はこういうことでしょう

        1 reply 0 retweets 0 likes
      3. 高校数学問題bot‏ @HS_Math_bot 4h4 hours ago
        Replying to @HS_Math_bot @SecretMagic___

        証明をしろ,との事ですが,これは考えた写像が条件を満たすことを示せ,という解釈でよろしいでしょうか?

        1 reply 0 retweets 0 likes
      4. 高校数学問題bot‏ @HS_Math_bot 4h4 hours ago
        Replying to @HS_Math_bot @SecretMagic___

        よくある写像の例はf(n)=2m-1,f(-n)=2mという,ℤの正の数をℕの奇数に,ℤの負の数をℕの偶数に対応させるものです ある写像が全単射であることを示すやり方はおそらく習っているでしょうから,やってみてください

        1 reply 0 retweets 0 likes
      5. 高校数学問題bot‏ @HS_Math_bot 4h4 hours ago
        Replying to @HS_Math_bot @SecretMagic___

        すみません,ℕからℤへの全単射なので,n∈ℕ,m∈ℤとしてf(2n-1)=m,f(2n)=-mとした方がいいですね このfが全単射であることを示せないのでしたら言ってください

        0 replies 0 retweets 0 likes
      6. End of conversation

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