123/321×321/123
123/321×321/123
日期:2021-05-15 15:17:32 人气:1
令a=321/123,b=345/234,c=432/543
则原式=(a+b+c)*(b+c+1/a)-(a+b+c+1/a)*(b+c)
=(a+b+c)*(b+c)+(a+b+c)/a-(a+b+c)*(b+c)-(b+c)/a
=1
则原式=(a+b+c)*(b+c+1/a)-(a+b+c+1/a)*(b+c)
=(a+b+c)*(b+c)+(a+b+c)/a-(a+b+c)*(b+c)-(b+c)/a
=1