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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Application of derivative 1
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[Post New]28 Aug 2008 19:06:38 IST
    Subject: Application of derivative 1
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reddevil_2009 (1410)

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[Post New]28 Aug 2008 21:16:37 IST
    Subject: Re:Application of derivative 1
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konichiwa2x (2373)

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By AM - GM,


 


 
Guide to latex:
http://www.goiit.com/posts/list/community-shelf-a-guide-to-latex-48056.htm

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[Post New]28 Aug 2008 21:26:38 IST
    Subject: Re:Application of derivative 1
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konichiwa2x (2373)

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For question 3 :


The assertion is correct and the reason is the correct explanation for it.


 is equal to 2  only when there are  two values such that .


=>    which is clearly not possible as b/a is irrational.
Guide to latex:
http://www.goiit.com/posts/list/community-shelf-a-guide-to-latex-48056.htm

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[Post New]28 Aug 2008 23:26:22 IST
    Subject: Re:Application of derivative 1
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reddevil_2009 (1410)

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first answer is wrong................


 


&&&&& in  the second one plzzzz explain  x=(4n+1)pi/2a =(4m+1)pi/2b
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[Post New]29 Aug 2008 09:22:52 IST
    Subject: Re:Application of derivative 1
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sachinguptaiit (964)

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\LARGE{\text{$a^2x^4+b^2y^4=c^6$}}


\LARGE{\text{$\frac{a^2x^4+b^2y^4}{2}=\frac{c^6}{2}$}}


\LARGE{\text{$\frac{a^2x^4+b^2y^4}{2}\ge\sqrt{a^2b^2x^4y^4}$}}


\LARGE{\text{$\frac{c^6}{2ab}\ge{x^2y^2}$}}


\LARGE{\text{${xy}\le\sqrt{\frac{c^6}{2ab}}$}}
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[Post New]30 Aug 2008 21:46:15 IST
    Subject: Re:Application of derivative 1
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konichiwa2x (2373)

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yeah sorry abt that....i was off my mind when i posted the 1st question.


sachin's answer is correct.
Guide to latex:
http://www.goiit.com/posts/list/community-shelf-a-guide-to-latex-48056.htm

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[Post New]30 Aug 2008 21:47:28 IST
    Subject: Re:Application of derivative 1
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konichiwa2x (2373)

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Regarding the 2nd question, have you learnt trigonometric identities and solutions?  Its pretty self explanatory is you have.
Guide to latex:
http://www.goiit.com/posts/list/community-shelf-a-guide-to-latex-48056.htm

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