(x-3)(x-2)(x-5)≥0,
(x-3)(x-2)(x-5)≥0,
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
化简 x(x-1)+2x(x+1)-3x(2x-5)
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
x(x平方-1)+2X平方(X+1)-3X(2X-5)帮个忙
x(x-14)二0*x平方十|2x十27=0,x平方=x+56,x(5x+4)=5x+4,4x平方-45=3|x,-3x
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
已知x²-x-1的值是0求x³-x²-x+5和(3x²+5x+2)-(x
求和:Sn=1+3x+5x*x+7x*x*x+……+(2n-1)x^n-1 (x不为0和1)