x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?
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x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000 x=?
x-(1/2x+20000)-{3/4[x-(1/2x+20000)]-10000}=205000
1/2x-20000-{3/4[x-(1/2x+20000)]-10000}=205000
1/2x-3/4[x-(1/2x+20000)]+10000=225000
1/2x-3/4[x-(1/2x+20000)]=215000
1/2x-3/4x+3/4(1/2x+20000)=215000
-1/4x+3/4(1/2x+20000)=215000
-1/4x+3/8x+15000=215000
1/8x=200000
x=1600000
1/2x-20000-{3/4[x-(1/2x+20000)]-10000}=205000
1/2x-3/4[x-(1/2x+20000)]+10000=225000
1/2x-3/4[x-(1/2x+20000)]=215000
1/2x-3/4x+3/4(1/2x+20000)=215000
-1/4x+3/4(1/2x+20000)=215000
-1/4x+3/8x+15000=215000
1/8x=200000
x=1600000
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
1/(x-4)(x-3)+1/(x-3)(x+2)+1/(x-2)(x-1)+1/(x-1)x+1/x(x+1)=1/x
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
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+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:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3