(1/x+1)+(1/x+10)=(1/x+2)+(1/x+9)

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(1/x+1)+(1/x+10)=(1/x+2)+(1/x+9)
(1/x+1)+(1/x+10)=(1/x+2)+(1/x+9)

(1/x+1)+(1/x+10)=(1/x+2)+(1/x+9)
1/（x+1)+1/（x+10)=1/（x+2)+1/（x+9),
1/（x+1)-1/（x+2)=1/（x+9)-1/（x+10)
[（x+2）-(x+1)]/(x+!)(x+2)=[(x+10)-(x+9)]/(x+9)(x+10)
1/(x+1)(x+2)=1/(x+9)(x+10),
(x+1)(x+2)=(x+9)(x+10)
x^2+3x+2=x^2+19x+90,
16x=-88,
x=-11/2
经检验,x=-11/2是方程的根

1/(x+1)+1/(x+10)=1/(x+2)+1/(x+9)
1/(x+1)-1/(x+2)=1/(x+9)-1/(x+10)
1/((x+1)(x+2))=1/((x+9)(x+10))
(x+1)(x+2)=(x+9)(x+10)
3x+2=19x+90
x=-11/2

1/(x+1)+1/(x+10)=1/(x+2)+1/(x+9)
(x+1+x+10)/(x+1)(x+10)=(x+2+x+9) /(x+2)(x+9)
(2x+11)/(x+1)(x+10)=(2x+11) /(x+2)(x+9)
(2x+11)/(x+1)(x+10)-(2x+11) /(x+2)(x+9) =0
(2x+11)[1/(x+1)(x+10...

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1/(x+1)+1/(x+10)=1/(x+2)+1/(x+9)
(x+1+x+10)/(x+1)(x+10)=(x+2+x+9) /(x+2)(x+9)
(2x+11)/(x+1)(x+10)=(2x+11) /(x+2)(x+9)
(2x+11)/(x+1)(x+10)-(2x+11) /(x+2)(x+9) =0
(2x+11)[1/(x+1)(x+10)-1 /(x+2)(x+9)] =0
(2x+11)[(x+2)(x+9)-(x+1)(x+10)]/(x+1)(x+10)(x+2)(x+9) =0
(2x+11)[x^2+11x+18-(x^2+11x+10)]/(x+1)(x+10)(x+2)(x+9) =0
8(2x+11)/(x+1)(x+10)(x+2)(x+9) =0
8(2x+11)=0
x=-11/2
经检验x=-11/2是方程的解

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X(X-1)=X 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4) x+x+1=(10x+x+1)×5 x/x+(1-x)/x-1/x 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| x>=1,x 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解? 1/(x-1)x+1/x(x+1)+.+1/(x+9)(x-10)=? x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, (x+2)(x^2+5x-10)-(x+2)^2(x-1),其中x=1.5 (x+2)(x^2+5x-10)-(x+2)^2(x-1),其中x=1.5, x*x*x*x+2008x*x+2007x+2008(提示：x*x*x-1=（x-1）*（x*x+x+1）） x/x平方-x+2=2x/x+1 (X+1)X(X+2)X(X+3)=504