Tính 1 / 1.4 + 1 / 4.7 + 1 / 7.10 + ... + 1 / 100.103
Giải thích
11.4+14.7+17.10+...+1100.103=13.31.4+34.7+37.10+...+3100.103=1311−14+14−17+17−110+...+1100−1103=13.1−1103=34103
11.4+14.7+17.10+...+1100.103=13.31.4+34.7+37.10+...+3100.103=1311−14+14−17+17−110+...+1100−1103=13.1−1103=34103