5/12+X=0.75 X-(1/6+3/8)=5/12
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(X+8)(X+1)=-12 X的平方+X+8X+8+12=0 X的平方+9X+20=0 (X+5)(X+4)=0 所以
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
解一元一次方程:(1-1/3)x=26-x+1 12/17x+520=(x+520)*5/6 8/15x-3+8/15x
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),
(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
3/x-1=4/x 6/x+1=x+5/x(x+1)
解下列方程(2)4x²+12x+9=81 (4)2x²+3x=3 (6)x(2x-5)=4x-10