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anhlinhtu47
2 năm trước
Câu 1: Cho (x+√x²+3)(y+√y²+3)=3 Tính x+y Câu 2: Cho a;b;c ≥0.Chứng minh rằng a+b+c ≥ √ab+√bc+√ca Câu 3: CMR A= √(1+2008²+2008²/2009²)+2008/2009 có giá trị là số tự nhiên BN NÀO LÀM NHANH GIÚP MIK VỚI MAI MIK CẦN RỒI ! HELPPPP MEEEEEE ! PLEASE!
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