The optimal solution of this linear programming problem is at the intersection of constraints 1 and 2.  Max 2x1 + x2 s.t. 4x1 + 1x2 ≤ 400   4x1 + 3x2 ≤ 600   1x1 + 2x2 ≤ 300        x1, x2 ≥ 0 Over what range can the coefficient of x1 vary before the current solution is no longer optimal?

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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The optimal solution of this linear programming problem is at the intersection of constraints 1 and 2. 
Max 2x1 + x2
s.t. 4x1 + 1x2 ≤ 400
  4x1 + 3x2 ≤ 600
  1x1 + 2x2 ≤ 300
       x1, x2 ≥ 0

Over what range can the coefficient of x1 vary before the current solution is no longer optimal?

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Over what range can the coefficient of x2 vary before the current solution is no longer optimal?

Compute the dual value for the first constraint.

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