x-(5/6-1/4)=2/3 2x-5/8=1-5/8 怎么做?
8—5x=x—3和2x+3=11+5分之1x怎么做
2x/(x^2+x)-1/x=5/(x+1)怎么做?
5x+1/6=9x+1/8-1-x/3怎么做?
5X+2(8-X)=20怎么做
3+2分之1x=4x和3x—2(5x—4)=2+(5—6)x怎么做
(5x+1/4)-(2x-1/6)=1-(3-x/12)怎么做?还有1-(0.7+3x/0.8)=(0.3x-1/0.4
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3