Recent content by csc2iffy

Thanks for your help... I'm starting to see it now somewhat. One last question: is my fY(y) = (1/10) Ʃ (1/(x2+1)) from x=y0 to x=9 correct? I got (c) 42.3% (d) ?

Sorry, the full problem says X uniformly selects an integer, x, from S={1,...,9}, and then Y uniformly selects an integer from {0,...,x^2} Also, once I have (b), how do I apply that to (c) and (d)?

Homework Statement Suppose X selects an integer from the set S = {0,1,...,9} and Y selects an integer from {0,...,x^2}. Find: (a) f(x,y) [joint prob density func] (b) fY(y) [marginal for Y] (c) Probability (Y <= 10 | X = 5) (d) Probability (Y <= 10 | X <= 5)Homework Equations The Attempt at a...

But I'm trying to solve it using IOR and I can't have a function with absolute values I thought?

This is what I have after doing some research online: Let X = 2x1 - 3x2 ----> Minimize |X| subject to X ≤ X' -X ≤ X' ----> Minimize X' subject to 2x1 - 3x2 ≤ X' -2x1 + 3x2 ≤ X' Question, what is X'?

Alright, here is my graphical analysis: optimal value = 0, occurs at (0,0) and (3,2) is this correct?

Yes that's basically what I'm trying to ask about here. I tried looking in my book but I can't seem to find absolute value objective functions. I remember my teacher talking about this but her example isn't about absolute value objective let xi = xi+ - xi- |xi| = xi+ + xi- But I'm still...

Homework Statement Minimize |2x1-3x2| subject to x1+x2≤5 -x1+x2≥-1 x1≥0, x2≥0 (a) Solve the problem graphically. (b) Formulate a linear program that could be used to solve the problem. Use software to solve your LP and show how to reconstruct a solution to the original problem...

Maximize Z = 4x + 5y + 3z subject to x + y + 2z ≥ 20 15x + 6y + 5z ≤ 50 x + 3y + 5z ≤ 30 and x ≥ 0, y ≥ 0, z ≥ 0 Work through the simplex method step by step to demonstrate that this problem does not possesses any feasible solutions

Homework Statement Minimize Z = 3.5x + 6.5y subject to 1. (1/3)x + y ≥ 1 2. 3.8x + 2.4y ≥ 5 and x ≥ 0, y ≥ 0 Use Big M method and then Two-Phase method interactively with IOR.jar and compare answers. Homework Equations The Attempt at a Solution I am getting really confused...

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nope my textbook just goes into the matrices of LP problems, not their properties :( i just assumed it worked with matrices as it does with regular numbers, since any entry in A or B is just a number... so my attempt is completely wrong?

OK. this proof is in my linear programming class. I cannot remember what this means.. she did not give us a recap on inequalities of matrices

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