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ptc-67543321-Visitor
1-Visitor
Feb 17, 2015 10:26 PM UTC
Question

a problem with calculating a parameter

Hi all,

I am still new to mathcad, can you please help me with the following question?!

I am trying to solve the attached equation in mathcad for t(i), and plot t(i) vs Mcor(i)/Mco(i). But I can't make mathcad to solve t for me,

I appreciate very much your answers!

1 reply

Werner_E
Werner_E25-Diamond I
25-Diamond I
Feb 18, 2015 5:38 PM UTC

Are you sure about the equation? Its not dependent on the ratio of the two M's but on their product.

Anyway, leave away the i - you have not defined a range i anyway.

Use the boolean = in your equation (no i's), put in into a solve block between Given and Find(t). Put a guess value in front of the Given and turn the solve block into a function of MCor and Mcor --> f(Mcor,Mco):=Find(t)

After that you may define your vectors Mcor and Mco and call f(Mcor,Mco), but you have to vectorize that call because of you vector arguments.

I found that the results are very dependent on the guess value and may range up to t=10^44 with the equation given.

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