找规律 第一行 2,-4,8,-16,32,-64.第二行0,-6,6,-18,30,-66.第三行 -2分之1,1,-2,4,-8
16..
每行中取第10个数,他们和为
人气:475 ℃ 时间:2019-08-20 00:01:32
解答
1 2 3 4 5 6 7 8 9 102 -4 8 -16 32 -64 128 -256 512 -1024 2 ^n * (-1)^(n-1) n=1,2,3...0 -6 6 -18 30 -66 126 -258 510 -1026 2^n * (-1)^(n-1) - 2-1/2 1 -2 4 -8 16 -32 64 -128 256 (-2)^(n-2)每行中取第10个...
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