1/4+1/28+1/70.+1/9700

1/4+1/28+1/70+.+1/9700 要找规律,今晚8:30之前! (28+1/4)*1/4等于多少 1/4+1/28+1/70+…1/89698=? 1/4+1/28+1/70+1/130简算 1/4+1/28+1/70+1/130 1/4+1/28+1/70+1/130=? (1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30) （1）1+1/2+1/3+1/4+1/5+1/6+1/7+1/14+1/28 (1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)) (-28)*(-0.125)+(-28)*1/8-28*(-4/7) 1|4+1|28+1|70+1|130+1|208+1|304 1-1/4-1/28-1/72-1/130 裂项法计算