Inequalities

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Hasib
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Inequalities

Unread post by Hasib » Thu Dec 16, 2010 9:09 pm

Its an very important part of inequalities. But, i can't get the part min(a,b) $\&$ max(a,b).
$min(a,b)\le \frac{2ab}{a+b} \le \sqrt{ab} \le \frac{a+b}{2} \le \sqrt{\frac{a^2+b^2}{2}} \le max(a+b)$

what's the mean of min(a,b) and max(a,b) in the upper equation?
Last edited by Hasib on Fri Dec 17, 2010 2:25 pm, edited 1 time in total.
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Avik Roy
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Re: Inequalities

Unread post by Avik Roy » Fri Dec 17, 2010 11:07 am

the terms $min(a,b)$ and $max(a,b)$ represent the minimum and maximum of $a$ and $b$ respectively.

Take an example:
$min(3,4)=3$
and $max(3,4)=4$
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Hasib
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Re: Inequalities

Unread post by Hasib » Fri Dec 17, 2010 2:03 pm

If any of a or b are fraction, then??
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Masum
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Re: Inequalities

Unread post by Masum » Sat Dec 18, 2010 12:35 pm

hasib.mo wrote:If any of a or b are fraction, then??
Then determine which fraction is the least.To determine this use this:which is greater $\frac 9 7$ or $\frac {15} {11}$?Multiply both side with $lcm$ of the denominators.Then see which side has the greater one.
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Re: Inequalities

Unread post by Hasib » Sat Dec 18, 2010 2:04 pm

Oh, i can determine the least & largest from fraction. Thanks.
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Re: Inequalities

Unread post by Moon » Sat Dec 18, 2010 8:05 pm

$min(a,b)$ মানে হইল $a,b$ এর ভেতর সবচেয়ে ছোট সংখ্যা। এইখানে ভগ্নাংশ কেন অমূলদ সংখ্যা আসলেও সমস্যা নাই। যেকোন বাস্তব সংখ্যার জন্য এই অসমতা সত্য।
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Re: Inequalities

Unread post by Hasib » Sat Dec 18, 2010 8:08 pm

Moon wrote:$min(a,b)$ মানে হইল $a,b$ এর ভেতর সবচেয়ে ছোট সংখ্যা। এইখানে ভগ্নাংশ কেন অমূলদ সংখ্যা আসলেও সমস্যা নাই। যেকোন বাস্তব সংখ্যার জন্য এই অসমতা সত্য।

ha, aibar bujhte parci :)
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