用归纳法,设a,b,c,d满足条件,g是a,b,c,d的最小公倍数,则g*(a-1)/a, g*(b-1)/b, g*(c-1)/c, g*(d-1)/d, g也满足条件。
用归纳法,设a,b,c,d满足条件,g是a,b,c,d的最小公倍数,则g*(a-1)/a, g*(b-1)/b, g*(c-1)/c, g*(d-1)/d, g也满足条件。
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