(1+1/97)+(2+2/97)+(3+3/97)+…+(96+96/97)+(97+97/97).

问题描述:

(1+

1
97
)+(2+
2
97
)+(3+
3
97
)+…+(96+
96
97
)+(97+
97
97
).

(1+

1
97
)+(2+
2
97
)+(3+
3
97
)+…+(96+
96
97
)+(97+
97
97
),
=1+2+3+…+96+97+(
1
97
+
2
97
+
3
97
+…+
96
97
+
97
97
),
=(1+97)×97÷2+[(1+97)×97÷2×
1
97
],
=4753+[4753×
1
97
],
=4753+49,
=4802.