计算 (50/1-1)(49/1-1)(48/1-1)...(4/1-1) (3/1-1)(2/1-1)
问题描述:
计算 (50/1-1)(49/1-1)(48/1-1)...(4/1-1) (3/1-1)(2/1-1)
答
(你打反了,50分之1应该是1/50,以此类推)原式=(-49/50)×(-48/49)×(-47/48)×.×(-1/2)=-49/50×48/49×47/48×.×2/3×1/2 (因为有49个负数相乘,积为负数)=-(49×48×.×2×1)/(50×49×.×3×2)=-1/50 (因为其他...