1/5+( )/5+2/( )+2/( )=2
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1/5+( )/5+2/( )+2/( )=2
1/5+( )/5+2/( )+2/( )=2
1/5+( )/5+2/( )+2/( )=2
1/5+( 4 )/5+2/(4)+2/( 4)=2
5 5 5
1/5+( 4 )/5+2/(4)+2/( 4)=2
还有别的答案吗?楼主请告知,谢谢!
都是4
1 5 5
1/5+4/5+2/2+2/2
1/5+5/5=2/5+2/5=2
5 5 5
4 4 4
利用公式:1/a=a+1/a(a+1)=1/a+1 +1/a(a+1)
得 1/5+4/5+2/3+2/6
1/5+(4)/5+2/(4)+2/(4)=2
5 5 5
4 4 4,一目了然
1/5+(2)/5+2/(5)+2/(2)
1/5+( 4 )/5+2/(4)+2/( 4)=2