x,y为正数,x+y=1,证明x²+y²+1/x²+1/y²≥17/2
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x,y为正数,x+y=1,证明x²+y²+1/x²+1/y²≥17/2
x,y为正数,x+y=1,证明x²+y²+1/x²+1/y²≥17/2
x,y为正数,x+y=1,证明x²+y²+1/x²+1/y²≥17/2