In: Mechanical Engineering
Solve by Excel Solver using branch and bound method.
Minimise:
f = 4x1 + 5x2 + x3 + 4x4 + 2x5 + 11x6 + 2x7
Subject to:
g1 = 2x1 + 4x2 + 5x3 + 7x4 + x5 + 4x6 + 10x7 ≥ 110
g2 = 4x1 + x2 + 5x3 + 7x4 + 3x7 ≤ 80
g3 = 2x1 + 5x2 + 3x3 + 3x4 + x5 + 8x6 + x7 ≥ 40
x1, x2, x3, x4 ∈ {1, 2, 3, 4}
x5, x6, x7 ≥ 0