1/1x2+1/2x3+1/3x4+.+1/99x100+1/2011x2012 五分钟之内求高人把它解出来
3个回答
1一1/2+1/2一1/3+1/3一1/4十1/4…一1/2010+1/2010一1/2011
=1一1/2011
=2010/2011
相关问题
1x1+0x1+2x2+1x2+3x3+2x3+4x4+3x4……99x99+98x99+100x100+99x100
解方程1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+99)(x+100)+1/x+100=199
[1/1x2]+[1/2x3]+[1/3x4]+[1/4x5]+…+[1/99x100].
[1/1x2]+[1/2x3]+[1/3x4]+[1/4x5]+…+[1/99x100].
[1/1x2]+[1/2x3]+[1/3x4]+[1/4x5]+…+[1/99x100].
计算:1 1 1 1 1 ——+ ——+——+.+————+———— 1x2 2x3 3x4 99x100 100x10
1/1x2+1/2x3+1/3x4+.+1/2011x2012=多少
若1!=1,2!=2x1,3!=3x2x1,4!=4x3x2x1,试求99!分之100!
解下列方程:x/1X2+x/2X3+x/3X4+……+x/99X100=1
[1+1.2]+[2+1.2x2]+[3+1.2x3]+.+[99+1.2x99]+[100+1.2x100]=?