选择合适的计算方式2 2 2 2 2-- + --- + --- + --- + ---- = 3 15 35 63 99
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选择合适的计算方式2 2 2 2 2-- + --- + --- + --- + ---- = 3 15 35 63 99
选择合适的计算方式
2 2 2 2 2
-- + --- + --- + --- + ---- =
3 15 35 63 99
选择合适的计算方式2 2 2 2 2-- + --- + --- + --- + ---- = 3 15 35 63 99
2 2 2 2 2
-- + --- + --- + --- + ----
3 15 35 63 99
4 2 2 2
=-----+ --- + --- + ----
5 35 63 99
6 2 2
=---- + --- + ----
7 63 99
8 2
=---- + ----
9 99
10
=----
11
2 2 2 2 2
-- + --- + --- + --- + ----
3 15 35 63 99
4 2 2 2
=-----+ --- + --- + ----
5 35 63 99
6 2 ...
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2 2 2 2 2
-- + --- + --- + --- + ----
3 15 35 63 99
4 2 2 2
=-----+ --- + --- + ----
5 35 63 99
6 2 2
=---- + --- + ----
7 63 99
8 2
=---- + ----
9 99
10
=----
11
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