Bài 17 :a) Biểu diễn miền nghiệm của hệ bất phương...

Bài 17 : 

a) Biểu diễn miền nghiệm của hệ bất phương trình: 

x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x x+y≤53x+2y≤12x               ≥1              y≥0">+ x+y≤53x+2y≤12x               ≥1              y≥0">y     x+y≤53x+2y≤12x               ≥1              y≥0">≤ x+y≤53x+2y≤12x               ≥1              y≥0">5

x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">3x+y≤53x+2y≤12x               ≥1              y≥0">x x+y≤53x+2y≤12x               ≥1              y≥0">+ x+y≤53x+2y≤12x               ≥1              y≥0">2x+y≤53x+2y≤12x               ≥1              y≥0">y x+y≤53x+2y≤12x               ≥1              y≥0">≤ x+y≤53x+2y≤12x               ≥1              y≥0">12 

x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x           x+y≤53x+2y≤12x               ≥1              y≥0">≥ x+y≤53x+2y≤12x               ≥1              y≥0">1 

x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">y           x+y≤53x+2y≤12x               ≥1              y≥0">≥ x+y≤53x+2y≤12x               ≥1              y≥0">0 

x+y≤53x+2y≤12x               ≥1              y≥0">x+y≤53x+2y≤12x               ≥1              y≥0">b) Tìm x, y là nghiệm của hệ bất phương trình (III) sao cho F = 3x + 7y đạt giá trị lớn nhất, giá trị nhỏ nhất.