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meap2k5
2 năm trước
1.Cho a>b>0. So sánh căn bậc hai của a+2 - căn bậc hai của a với căn bậc hai của b+2 - căn bậc hai của b 2. Cho x, y là các số thực dương thỏa mãn x + 3y<= 10 Chúng minh: 1/Căn bậc hai của x + 27/ Căn bậc hai của 3y >=10
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