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Why I get different result in a same Maximize Solveblock?

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Why I get different result in a same Maximize Solveblock?

I used MC15M030 to solving an optimitization problem, and I defined ALL >= 0, all the variable large or equal to zero.

I have used 4 methods to do it in a same Maximize Solveblock, but I have got 3 different result.

 

Look at the pictures below:

the result of (1) and (2) are same and right.

2015-03-24_151221.jpg

2015-03-24_151302.jpg

 

(3) and (4) are different and wrong.

2015-03-24_151328.jpg

2015-03-24_151354.jpg

How to explain this puzzle?

3 REPLIES 3
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Re: Why I get different result in a same Maximize Solveblock?

No one could help me?

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Re: Why I get different result in a same Maximize Solveblock?

Not sure what you want.

You change the constraint, you change the answer.

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Re: Why I get different result in a same Maximize Solveblock?

I think the meaning of the (1) (2) (3) (4) expressions are same, or I can not find any different between them. So I need help.

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