1*2/1+2*3/1+3*4/1+.+2004*2005/1=1*3/1+3*5/1+5*7/1+.+49*51/1=
问题描述:
1*2/1+2*3/1+3*4/1+.+2004*2005/1=
1*3/1+3*5/1+5*7/1+.+49*51/1=
答
1*2/1+2*3/1+3*4/1+.+2004*2005/1=
1*3/1+3*5/1+5*7/1+.+49*51/1=