解方程:(200/x)﹣[200/(x+0.5)]=1/3
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解方程:(200/x)﹣[200/(x+0.5)]=1/3
解方程:(200/x)﹣[200/(x+0.5)]=1/3
解方程:(200/x)﹣[200/(x+0.5)]=1/3
两边*x(x+0.5)
200(x+0.5)-200x=x(x+0.5)/3
200x+100-200x=(x²+0.5x)/3
x²+0.5x=300
(x+1/4)²-1/16=300
x+1/4=±√ 4801/16
x1=17.07
x2=-17.57
经检验是根