数列an满足a1 1_设数列an满足a1等于2_已知数列an满足a1 2a2剧情简介

设数列an满足a1等于2
设数列an满足a1等于2

数列an满足a1=1 an+1=an/2an+1,则a10=多少a(n+1)=an/(2an + 1) 1/a(n+1)=1/an + 2 1/a(n+1) - 1

已知数列an满足a1 2a2
已知数列an满足a1 2a2

数列﹛an﹜满足a1=1,1/2a(n+1)=1/2an+1(n∈N*)解: 1, 1/2a(n+1)=1/2an+1 那么1/a(n+1)=1/an +2,且1/a1=1

已知数列an和bn满足a1
已知数列an和bn满足a1

数列{an}满足a1=1,nan+1=(n+1)an+n(n+1),n∈N*.(Ⅰ)证明:数列{an数列{an}满足a1=1,nan+1=(n+1)an+n(n+1),n∈N*.(Ⅰ)证明:数列{ann}是等差数列;(Ⅱ)设bn=3n?an,求数列{bn}的前n项和Sn.解答:证明(Ⅰ)∵nan+1=(n+1)an+n(n+1),∴an+1n+1=ann+1,∴an+1

设数列an满足a1 3a2
设数列an满足a1 3a2
等比数列an中a1等于2
等比数列an中a1等于2
数列an的前n项和为sn
数列an的前n项和为sn
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1
数列an满足a1 1

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