已知等差数列an的前n项和为Sn，a5=5，S5=15，则数列1anan-1的前100项和为（）

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已知等差数列an的前n项和为Sn，a5=5，S5=15，则数列

1

a

n

a

n

-

1

的前100项和为（）

A： $\frac{100}{101}$

B： $\frac{99}{101}$

C： $\frac{99}{100}$

D： $\frac{101}{100}$

上一题下一题 0.0难度选择题更新时间:2019-06-15 04:46:20

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A

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Sydney Tower
Address: 100 Market St, Sydney
Phone: 02 9333 9222
Fax: 02 9333 9203
Open time: 9:00 a.m. t0 10:30 p.m. (Saturdays to 11:30 pm)
Ticket: $60 (for an adult) $30 (for a child)
Website: www.sydneytower.com.au
How to get there: train to Town Hall Station and a short walk along Market Street
How to book tickets: by phone/fax or through the web
Attractions: Sydney’s best views are just the beginning! Sydney Tower takes you to the highest point
above Sydney for exciting 360° view of our beautiful city.

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