Mathematics, 22.07.2021 14:00 jaemitchell23

Cho 6 số thỏa mãn: xa+yb=c ,xb+yc=a, xc+ya=b; abc khác 0 Tính P= $\frac{a^{2}}{bc}$+ $\frac{b^{2}}{ca}$+ $\frac{c^{2}}{ab}$

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