若0
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若0若0若0(x-1/x)^2=(x+1/x)^2-4=36-4=32因为:0(x+1/x)^2=36=>x^2+1/x^2+2=36=>x^2+1/x^2=34(x-1/x)=x^2+1/x^2-2
若0
若0
若0
(x-1/x)^2=(x+1/x)^2-4=36-4=32
因为:0
(x+1/x)^2=36=>x^2+1/x^2+2=36=>x^2+1/x^2=34
(x-1/x)=x^2+1/x^2-2=34-2=32
=>x-1/x=sqrt(32)
由x+1/x=6可得x^2-6x+1=0,又因0
6X-2 要过程吗?