计算 1234567890/1234567891平方-1234567890*1234567892
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计算 1234567890/1234567891平方-1234567890*1234567892
计算 1234567890/1234567891平方-1234567890*1234567892
计算 1234567890/1234567891平方-1234567890*1234567892
设1234567891为a,则原式为
(a-1)/[a²-(a-1)(a+1)]
=(a-1)[a²-(a²-1)]
=(a-1)[a²-a²+1)]
=a-1
=1234567890
1234567890/1234567891平方-1234567890*1234567892
=1234567890/1234567891^2-(1234567891-1)*(1234567891+1)
=1234567890/1234567891^2-1234567891^2+1
==1234567890
算式9个2000个9乘8个2000个8除6个2000个6,的计算结果的各位数字之和是1. 1234567891平方 - 1234567890 乘 1234567892 =1234567891^2-(123456789-1)
1234567890/1234567891的平方-1234567890*1234567892
=1234567890/1234567891^2-(1234567891-1)*(1234567891+1)
=1234567890/1234567891^2-1234567891^2+1
=1234567890