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填空并写出数列的通项公式1,3,7,,31,,127;2,5,,17,26,,50;1/2,-1/4,,-1/16,1/32,,1/128;1,√2,,2,√5,,√7
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填空并写出数列的通项公式
1,3,7,,31,,127;
2,5,,17,26,,50;
1/2,-1/4,,-1/16,1/32,,1/128;
1,√2,,2,√5,,√7
1,3,7,,31,,127;
2,5,,17,26,,50;
1/2,-1/4,,-1/16,1/32,,1/128;
1,√2,,2,√5,,√7
▼优质解答
答案和解析
15 63 2·2^(n-1)-1
10 37 n²+1
1/8 -1/64 (-1)^(n+1)1/(2^n)
√3 √6 √n
以上n=1,2,3,.
10 37 n²+1
1/8 -1/64 (-1)^(n+1)1/(2^n)
√3 √6 √n
以上n=1,2,3,.
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