January 30th, 2013, 09:24 PM  #1 
Senior Member Joined: Apr 2012 Posts: 799 Thanks: 1  find minimum
x,y>0 and 9x+4y=2005 Ans : 
January 31st, 2013, 07:13 AM  #2 
Senior Member Joined: Apr 2012 Posts: 799 Thanks: 1  Re: find minimum
[attachment=0:6ffsblz9]minimum.jpg[/attachment:6ffsblz9]

January 31st, 2013, 07:42 AM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: find minimum
335/26866 if x and y are integers; x=133 and y=202

February 2nd, 2013, 11:07 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,919 Thanks: 2203 
For the exact answer, (x, y) = (401/3, 401/2).

February 3rd, 2013, 04:51 AM  #5 
Senior Member Joined: Apr 2012 Posts: 799 Thanks: 1  Re: find minimum find the derivatives of g(y)=g'(y) let g'(y)=0 we get : (10y2005)(2y+2005)=0 

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