来自程志华的问题
1/k(k+1)(k+2)=1/2k+1/(k+1)+1/2(k+2)的拆法1/k(k+1)(k+2)=1/2k+1/(k+1)+1/2(k+2)是怎么拆出来的?我看书上就一步有什么公式或者定理嘛?
1/k(k+1)(k+2)=1/2k+1/(k+1)+1/2(k+2)的拆法
1/k(k+1)(k+2)=1/2k+1/(k+1)+1/2(k+2)是怎么拆出来的?
我看书上就一步有什么公式或者定理嘛?
1回答
2020-01-31 20:08