1/2+5/6+11/12+19/20+.9890/9900=
1/2+5/6+11/12+19/20+.9890/9900=
2分之1+6分之5+12分之11+20分之19+……+9900分之9890
1/2+5/6+11/12+19/20+...+9898/9900
1+1/2+5/6+11/12+19/20+……+9899/9900=?
1/2+5/6+11/12+19/20+...9701/9702+9899/9900怎么解
1/2+5/6+11/12+19/20+.+9899/9900详解
2/1+6/5+12/11+20/19+30/29+.+9702/9701+9900/9899
找规律计算:1/2+5/6+11/12+19/20+……+989/9900
2\1+6\5+12\11+20\19+30\29...+9900\9899
1/2+5/6+11/12+19/20.9890/9900 不是1/2+5/6+11/12+19/20.9899/990
用递等式计算:1/2+5/6+11/12+19/20+29/30+,9701/9702+9899/9900的和
1/2+5/6+11/12+19/20+29/30+……+9899/9900