1/2+1/6+1/12+1/20+1/30+...+1/9702+1/9900
1/2+1/6+1/12+1/20+1/30+...+1/9702+1/9900
1/2+1/6+1/12+1/20……1/9702+1/9900=?
2/1+6/5+12/11+20/19+30/29+.+9702/9701+9900/9899
1/2+1/6+1/12+...1/9702+1/9900=
1/2+1/6+1/12+...+1/9702+1/9900(简便运算)
1/2+1/6+1/12+1\20+1/30+1/42+.+1/9900=?
2/1+6/1+12/1+20/1+30/1+42/1+.+9900/1
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+...9701/9702+9899/9900怎么解
1/2+1/6+1/12+1/20+.+1/9900
1/2+1/6+1/12+1/20+1/30+……+1/9900 是多少?
1/2+1/6+1/12+1/20+1/30+.+1/9900=?