T
thoxinh_t2


Cho [tex]x^2 + 4y^2 =7[/tex]
Tìm Max: [tex]T= 2x-y[/tex]
Tìm Min : [tex]S=2x^2 - xy +3[/tex]
Tìm Max: [tex]T= 2x-y[/tex]
Tìm Min : [tex]S=2x^2 - xy +3[/tex]
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