问题 解答题
(1+
1
97
)+(2+
2
97
)+(3+
3
97
)+…+(96+
96
97
)+(97+
97
97
)
答案

(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.

单项选择题
单项选择题