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tkl1ov
2 năm trước
1. Cho 3 số dương a,b,c thoả mãn abc =1 Tìm Min của biểu thức : M= $\frac{bc}{ba^{2} + ca^{2}}$ + $\frac{ca}{cb^{2} + ab^{2}}$ + $\frac{ab}{ac^{2} + bc^{2}}$ 2. Cho x,y là 2 số dương thoả mãn điều kiện x+y>=4 Tìm giá trị nhỏ nhất của biểu thức : A = $\frac{3x^{2} +4}{4x}$ + $\frac{2 +y^{3} }{y^{2}}$ giúp mình với !!
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