1+1/2+2/2+2/1+1/3+2/3+3/3+2/3+1/3+.+1/2009+2/2009+.+2/2009+1/2009=?这是一道数奥题,巧算题
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1+1/2+2/2+2/1+1/3+2/3+3/3+2/3+1/3+.+1/2009+2/2009+.+2/2009+1/2009=?这是一道数奥题,巧算题
1+1/2+2/2+2/1+1/3+2/3+3/3+2/3+1/3+.+1/2009+2/2009+.+2/2009+1/2009=?
这是一道数奥题,巧算题
1+1/2+2/2+2/1+1/3+2/3+3/3+2/3+1/3+.+1/2009+2/2009+.+2/2009+1/2009=?这是一道数奥题,巧算题
1+(1/2+2/2+1/2)+(1/3+2/3+3/3+2/3+1/3)+.+(1/2009+2/2009+.+2/2009+1/2009)=1+2+……+2009
=(1+2009)×(2009/2)
=2019045
10921
2 1 -2 -3
(1-1/2^2)(1-1/3^2)(1-1/4^2).(1-1/2009^2),
(1+1/2+1/3+...
1 2 1 2 () () ()()
1+1/2^2
(1-1/2^2)*(1-1/3^2)*(1-1/4^2)*.*(1-1/2002^2)*(1-1/2003^2)
1+1+1+2+2×3
证明 1+1/1+1/1*2+1/1*2*3+.+1/1*2*3*...*n
计算:-2×(-1/2)^2+|-(-2)|^3-(-1/2)
计算:1+2^(-1)+2^(-2)+2^(-3)+...+2^(-2010)
1+2^1+2^2+2^3+.+2^2008=
证明1+1/2^2;+1/3^2;+1/4^2+1/n^2小于2
1/1+2+1/1+2+3+1/1+2+3+4.1/1+2+3.2011
1/(2^3)+1/(2^3+1)+1/(2^3+2)+1/(2^3+3)+...+1/(2^4-1)
1、求证:1/1^2+1/2^2+1/3^2+……+1/2008^2
下面这段Matlab中BP神经网络模型的代码中的LP.lr=0.P=[1,2,1,3,1,2,3,2,2,1,3,2,3,2;2,1,3,2,1,1,3,3,2,1,3,2,3,2;1,1,3,3,1,2,2,3,2,1,3,2,2,2;1,2,1,3,1,2,1,1,1,1,1,2,2,2;2,2,1,1,1,2,1,2,2,2,3,2,3,2;1,3,1,3,1,2,1,2,1,2,2,1,1,3;2,3,1,3,1,2,1,2
1,1,1,2,2,2,3,3,3,填三阶幻方
(2-1)(2+1)(2^2+1)(2^3+1)(2^4+1).(2^32+1)+1的个位数是多少?