化简如下、-1+2-3+4,-99+100每两项和负一,故答为负五十
当X=-1时 求X+2X^2+3X^3+…+99^99+100X^100
1个回答
相关问题
-
当x=-1时,求x+2x²+3x³+……+99x^99+100x^100的值
-
当x= -1 时,求x+2x²+3x³+.+99x的99次方+100x的100次方
-
1x1+0x1+2x2+1x2+3x3+2x3+4x4+3x4……99x99+98x99+100x100+99x100
-
3x(1x2+2x3+3x4+……+99x100)= (A)97x98x99 (B)98x99x100 (C)99x 1
-
[1+1.2]+[2+1.2x2]+[3+1.2x3]+.+[99+1.2x99]+[100+1.2x100]=?
-
1X1+2X2+3X3+4X4+5X5.+98X98+99X99+100X100=?
-
100X100—99X99+98X98+...+2X2—1X1
-
1x2+2x3+3x4+.99x100=?
-
3x(1x2+2x3+3x4+…+99x100)=
-
1.当x=1时,x-2x+3x-4x+……+99x-100x的值为( ) A.50 B.-50 C.100 D.-100