用换元法解方程3xx2?1+x2?1x=52,若设xx2?1=y.则原方程可化为( )A.y+1y=52B.2y2-5y+2=0C.3y+1y
用换元法解方程3xx2?1+x2?1x=52,若设xx2?1=y.则原方程可化为()A.y+1y=52B.2y2-5y+2=0C.3y+1y=52D.6y2+5y+2=0...
用换元法解方程3xx2?1+x2?1x=52,若设xx2?1=y.则原方程可化为( )A.y+1y=52B.2y2-5y+2=0C.3y+1y=52D.6y2+5y+2=0
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