x分之1+x+5分之1=6分之1 x=几?
人气：263 ℃ 时间：2020-09-01 10:34:26
解答
1/x+x+1/5=1/6
30+30x^2+6x-5x=2
30x^2+x+30=0
显然无解
1/x+1/(x+5)=1/6
6x+30+6x-x^2-5x=0
x^2-7x-30=0
(x+3)(x-10)=0
x1=-3,x2=10
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