(1/2+1/3+------+1/2009)x(1+1/2+------+1/2008)-(1+1/2+------+1/200_数学解答

(1/2+1/3+------+1/2009)x(1+1/2+------+1/2008)-(1+1/2+------+1/2009)x(1/2+1/3+------+1/2008)

人气：364 ℃　时间：2019-12-19 04:36:50

解答

(1/2+1/3+------+1/2009)x(1+1/2+------+1/2008)-(1+1/2+------+1/2009)x(1/2+1/3+------+1/2008)=(1/2+1/3+------+1/2009+1-1)x(1+1/2+------+1/2008)-(1+1/2+------+1/2009)x(1/2+1/3+------+1/2008+1-1)=(1+1/2+1...