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匈牙利赛题有一不等式,可加强为若a<sub>1</sub>,a<sub>2</sub>,b<sub>1</sub>,b<sub>2</sub>,c<sub>1</sub>,c<sub>2</sub>满足a<sub>1</sub>a<sub>2</sub>】0,a<sub>1</sub> c&l