若(x3+1xx
若(x3+1xx
不等式组1.2x>1-xx+2<4x-12.x-5>1+2x3x+2<4x3.2/3x+5>1-xx-1<3/4x-1/
若1+x+x2+x3=0,求x+x2+x3+…+x2000的值.
因式分解(1+x+x2+x3)2-x3
收集1些语句 XX 则XX
(x1,x2,x3)=(k-1)x1+(k+2)x2+(k+1)x3,若为正定,k的范围?
若x1,x2,x3的平均数为4,则x1+1,x2+2,x3+3的平均数是______.
因式分解x3-x2-x-1
(x1+x2+x3+...+xn-1)(x2+x3+x4+...+xn)-(x2+x3+x4+...+xn-1)(x1+
XX奋勇成语怎么组成.若有XX成语
女性染色体46xx 偶见 46 xx t (1:
若式子2−xx