This subject is introduced in multivariable calculus, and in more detail in 
some numerical analysis courses. Graphing is one common technique for 
identifying promising search ranges if the number of variables can be reduced 
to one or two. Analytical identification of asymptotes, extrema, and zeros can 
also be employed to set bounds/starting points for searching, but those topics 
are in general completely orthogonal to the topic of this mailing list... which 
is R.
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Sent from my phone. Please excuse my brevity.

On August 12, 2015 7:41:13 PM PDT, vidya <desak.ris...@yahoo.co.id> wrote:
>How can you find that starting value ? is there a trick for that ?.
>
>Really appreciate. Thank you very much. 
>
>
>King Regards
>
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>--
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