(1-1/2 1/3-1/4 1/5…… 1/50)/[1/(1 25) 1/(2 25)……+1/(25 25)]解答過程?謝謝?
題出的有問題吧什么叫(1-1/2 1/3-1/4 1/5…… 1/50)/[1/(1 25) 1/(2 25)……+1/(25 25)]