Cho x,y,z,t thỏa mãn \(\frac{x}{y+z+t}=\frac{y}{z+t+x}=\frac{y}{t+x+y}=\frac{t}{x+y+z}\)
Tính \(P=\frac{x+y}{z+t}+\frac{y+z}{x+t}+\frac{z+t}{x+y}+\frac{t+x}{y+z}\)
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Toán lớp 10
Cho x,y,z,t thỏa mãn \(\frac{x}{y+z+t}=\frac{y}{z+t+x}=\frac{y}{t+x+y}=\frac{t}{x+y+z}\)
Tính \(P=\frac{x+y}{z+t}+\frac{y+z}{x+t}+\frac{z+t}{x+y}+\frac{t+x}{y+z}\)
