Cho ba số thực \(x,y,z\)thỏa mãn điều kiện \(xy+yz+zx=4\). Chứng minh rằng:
A. \({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge 4\)
B.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{16}{3}\)
C.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{4}{3}\)
D.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{23}{3}\)
A. \({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge 4\)
B.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{16}{3}\)
C.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{4}{3}\)
D.\({{x}^{4}}+{{y}^{4}}+{{z}^{4}}\ge \frac{23}{3}\)
Loga
Hóa Học lớp 12
