x^2-x-1=100,x^3-2x^2=?
1个回答
x^3-2x^2=x^3-x^2-x-(x^2-x-1)-1=100x-101
由 x^2-x-1=100 解得 x
代入求 x^3-2x^2
相关问题
1x1+0x1+2x2+1x2+3x3+2x3+4x4+3x4……99x99+98x99+100x100+99x100
[1+1.2]+[2+1.2x2]+[3+1.2x3]+.+[99+1.2x99]+[100+1.2x100]=?
1)1x2+2x3+3x4+...+100x101= 2)1x2+2x3+3x4+...n(n+1)= (3)1x2x3
(1-1/2x2)(1-1/3x3).(1-1/100x100)
2X1-2+2X2-3+2X3-`4+2X4-5+…十2X99_100十2X100_101
1/2x-8 x+3x+(1/2x-8)=100 =x?
3x(1x2+2x3+3x4+…+99x100)=
1x2+2x3+3x4+.99x100=?
解方程1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+99)(x+100)+1/x+100=199
1x2X3x……x100=?