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無理數,即非有理數之實數,不能寫作兩整數之比.若將它寫成小數形式,小數點之後的數位有無限多個,並且不會迴圈.常見的無理數有非完全平方數的平方根、π和e(其中後兩者均為超越數)等.無理數的另一特徵是無限的連分數…
a=3.594125. b=-3.594125. a+b=0
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