计算:(1-1/2的平方)(1-1/3的平方)(1-1/4的平方)……(1-1/2009的平方)
网友回答
原式=(1-1/2)(1+1/2)(1-1/3)(1+1/3)……(1-1/2009)(1+1/2009)
=1/2*2010/2009
=1005/2009
======以下答案可供参考======
供参考答案1:
原式=1/2×2/3×3/4×....×2007/2008×2008/2009
=1/2009
供参考答案2:
原式=(1/2)² 乘以(2/3)²乘以……
=(1/2乘以2/3乘以……)²
=(1/2009)²
供参考答案3:
原式=(1/2×3/2)(2/3×4/3)(3/4×5/4)·········(2008/2009×2010/2009)
=1/2×2010/2009