4x-2=3-x -7x+2=2x-4 -x=-0.4x+1 11x+1=5(2x+1) 4x-3(20-x)=3 5(
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4x-2=3-x -7x+2=2x-4 -x=-0.4x+1 11x+1=5(2x+1) 4x-3(20-x)=3 5(x+8)-5=0 2(3-x)=9 -3(x+3)=24 -2(x-2)=12
1.4x-2=3-x x =1 2.-7x+2=2x-4 x =三分之二 3.-x=-0.4x+1 x =-三分之五 4.11x+1=5(2x+1) x =4 5.4x-3(20-x)=3 x =9 6.5(x+8)-5=0 x =-7 7.2(3-x)=9 x =-1.5 8.-3(x+3)=24 x =-11 9.-2(x-2)=12 x =-4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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
1x+2x+3x+4x+5x+6x+7x…+99x=100
(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
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
3x(7-2x)+5x(2x-1)=4x(x-3)+5
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?