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conmehue
2 năm trước
Cho $\frac{x}{a}$ =$\frac{y}{b}$ =$\frac{z}{c}$ $\neq$ 0.Tính giá trị của biểu thức :P=$\frac{(x^{2} +y^{2} +z^{2})(a^{2}x+b^{2}y+c^{2}z)}{(a^{2}+b^{2}+c^{2})(x^{3}+y^{3}+z^{3})}$
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