2(x² +1÷x²)-3(x +1÷x)=1
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2(x² +1÷x²)-3(x +1÷x)=1
2(x² +1÷x²)-3(x +1÷x)=1
2(x² +1÷x²)-3(x +1÷x)=1
令y=x+1/x,在x为非0实数的情况下,y的取值范围是y=2
方程边形为2y^2-3y-5=0,(2y-5)(y+1)=0
解得y=5/2或y=-1(舍掉)
再由x+1/x=5/2求x,容易得到x=2或x=1/2