100X100一99X99+98X98一97X97+,十2X2一1X1
已知x4+x3+x2+x+1=0,求x100+x99+x98+x97+x96的值.
1X2分之1十2X3分之1十3X4分之1…十98X99分之1十99X100分之1=().求答案和规律
1/1x2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100
1/1X2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100求结果!
2/1x2+2/2x3+2/3x4+2/4x5+...+2/98x99+2/99x100
求1x2,2x3,3x4,4x5,……98x99,99x100的倒数和
100一99十98一97十96一95十94一93……十4一3十2一1=?
计算:99十98一97十96十95一95一94十93十92一91⋯⋯十3十2一1
(十1)十(一2)十(十3)十(一4)十.十(十99)十(一100)咋做
56X99+56 37X29+37+37X70 99X99+99 16X98+32 37X15+37X10X6+37X2
|00十99一98十97一96……十3一2十1=?
1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101