用歸納法,設a,b,c,d滿足條件,g是a,b,c,d的最小公倍數,則g*(a-1)/a, g*(b-1)/b, g*(c-1)/c, g*(d-1)/d, g也滿足條件。
用歸納法,設a,b,c,d滿足條件,g是a,b,c,d的最小公倍數,則g*(a-1)/a, g*(b-1)/b, g*(c-1)/c, g*(d-1)/d, g也滿足條件。
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