计算2/2²-1+2/4²-1+2/6²-1+2/8²-1+2/10²-1+2/12²-1.

问题描述:

计算2/2²-1+2/4²-1+2/6²-1+2/8²-1+2/10²-1+2/12²-1.
要有算式和答案

2/(2²-1)+2/(4²-1)+2/(6²-1)+2/(8²-1)+2/(10²-1)+2/(12²-1)=2/[(2-1)×(2+1)]+2/[(4-1)×(4+1)]+2/[(6-1)×(6+1)]+2/[(8-1)×(8+1)]+2/[(10-1)×(10+1)]+2/[(12-1)×(12+1)]=2/(1×3)...