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無理數就是無限不循環小數 而循環小數是一定可以化作分數的 所以說分數一定是有理數 但是如果你覺得2分之根號2是分數的話…我無言 反正就是那個意思 那你可以明白我的意思麼?
錯! 0乘以任何數得0,0是有理數
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