(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)要有过程和理由解释.有满意答案会额外给50分.
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(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)要有过程和理由解释.有满意答案会额外给50分.(1-1/2²)(1
(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)要有过程和理由解释.有满意答案会额外给50分.
(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)要有过程和理由解释.
有满意答案会额外给50分.
(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)要有过程和理由解释.有满意答案会额外给50分.
(1-1/2²)(1-1/3²)×……×(1-1/2011²)(1-1/2012²)
=(1+1/2)(1-1/2)(1+1/3)(1-1/3)x...x(1+1/2011)(1-1/2011)(1+1/2012)(1-1/2012)
=3/2x1/2x4/3x2/3x...2012/2011x2010/2011x2013/2012x2011/2012
=1/2x2013/2012
=2013/4024