解方程:(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+7x+12)+(1/x²+9x+20)=1/8
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解方程:(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+7x+12)+(1/x²+9x+20)=1/8解方程:(1/x²+3x+2)+(1
解方程:(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+7x+12)+(1/x²+9x+20)=1/8
解方程:(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+7x+12)+(1/x²+9x+20)=1/8
解方程:(1/x²+3x+2)+(1/x²+5x+6)+(1/x²+7x+12)+(1/x²+9x+20)=1/8
1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+1/(x+4)(x+5)=1/8
1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+1/(x+3)-1/(x+4)+1/(x+4)-1/(x+5)=1/8
1/(x+1)-1/(x+5)=1/8
(x+5-x-1)/(x+1)(x+5)=1/8
32=x²+6x+5
x²+6x-27=0
(x+9)(x-3)=0
x=-9 x=3
检验:x=-9 x=3是方程的解