- #1
anemone
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MHB
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Consider the following equations:
$a^2+b^2=16$
$c^2+d^2=25$
$ad-bc=20$
where $a,\,b,\,c,\,d \in R$
Find the maximum value of $ac$.
Remember to read the http://www.mathhelpboards.com/showthread.php?772-Problem-of-the-Week-%28POTW%29-Procedure-and-Guidelines to find out how to http://www.mathhelpboards.com/forms.php?do=form&fid=2!
$a^2+b^2=16$
$c^2+d^2=25$
$ad-bc=20$
where $a,\,b,\,c,\,d \in R$
Find the maximum value of $ac$.
Remember to read the http://www.mathhelpboards.com/showthread.php?772-Problem-of-the-Week-%28POTW%29-Procedure-and-Guidelines to find out how to http://www.mathhelpboards.com/forms.php?do=form&fid=2!