cho hệ pt:
$\left\{\begin{matrix} (2x^{3}-3x^{2}+x)\sqrt{x^{2}-x+3+m^{2}}+(2y^{3}-3y^{2}+y)\sqrt{y^{2}-y+3+m^{2}}=0 & \\ x^{2}-2my=m+3& \end{matrix}\right.$
cmr: với mọi m hệ luôn có nghiệm
cho hệ pt: $\left\{\begin{matrix} (2x^{3}-3x^{2}+x)\sqrt{x^{2}-x+3+m^{2}}+(2y^{3}-3y^{2}+y)\sqrt{y^{2}-y+3+m^{2
Started By hungpronc1, 09-04-2013 - 17:22
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