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a/b-b/a=a²;-b²;/aba/b-b/a-a²;+b²;/ab=(a²;-b²;-a²;-b²;)/ab=-2b²;/ab=-2b/aa²;+ab-ab²;=0這裡可能解不出來啊,你看看是不是寫錯了,若後面的這個條件,如果錯了請…
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