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x,y,z为异于1的实数,则满足XYZ=1,证明X^2/(X-1)+Y^2/(Y^2-1)+Z^2/(Z^2-1)>=1
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x,y,z 为异于1的实数,则满足XYZ=1,证明X^2/(X-1)+Y^2/(Y^2-1)+Z^2/(Z^2-1)>=1
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x,y,z 为异于1的实数,则满足XYZ=1,证明X²/(X²-1)+Y²/(Y²-1)+Z²/(Z²-1)≥1已知可得z=1/xy原式X²/(X²-1)+Y²/(Y²-1)+1/(1-x²y²)≥1不妨设xy=1.1若y为+∞,...
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