(7²+1)/(7²-1)+（9²+1）/（9²-1）+…+（99²+1）/（99²-1）简便运算 急
问题描述：
(7²+1)/(7²-1)+（9²+1）/（9²-1）+…+（99²+1）/（99²-1）简便运算 急
答
(7²+1)/(7²-1)+（9²+1）/（9²-1）+…+（99²+1）/（99²-1）=[1+2/(7²-1)]+[1+2/(9²-1)]+[1+2/(11²-1)]+……+[1+2/(99²-1)]=1+2/(7+1)(7-1)+1+2/(9+1)(9-1)+1+2/(1...