计算(详细步骤和依据,(1-1/2²)·(1-1/3²)·(1-1/4²)···(1-1/2012²)·(1-1/2013²)·(1-1/2014²)

来源:学生作业学帮网 编辑:学帮网 时间:2024/07/02 16:58:11

计算(详细步骤和依据,(1-1/2²)·(1-1/3²)·(1-1/4²)···(1-1/2012²)·(1-1/2013²)·(1-1/2014²)

原式=(1-1/2)(1+1/2)(1-1/3)(1+1/3)(1-1/4)(1+1/4)...
=1/2x3/2x2/3x4/3x3/4x5/4...
=1/2x2/3x3/4...x3/2x4/3x5/4...
=1/2014x2015/2
=2015/4028