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很簡單的,用作差比較法,然後選取公因式,判斷一下正負就可以知道大小了.例如比較ab²;和ab的大小,就用ab²;-ab=ab(b-1),顯然a是正數,b是負數,ab就是負的,b-1也是負的,負負得正,所以可得ab²;-ab=ab(b-1)…
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