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Algebra

Blazing goIITian

Joined:	20 Jul 2008
Post:	610

24 May 2009 12:13:24 IST

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243

PLZ try this .......................

None

The sixth term of an arithmetic progression is 3 and the common difference exceeds 0.5. At what value of the difference of the progression is the product of the first, the fourth and the fifth term is the greatest.. Give full explanation

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Sujit

Blazing goIITian

Joined: 11 Mar 2009

Posts: 1345

24 May 2009 12:28:46 IST

Like 3 people liked this

LET

SUBSTITUTE a=3-5d

we get

diffrevtiate it wid respect to d and equate it wid zer to get the value of d

we get

chooose the value which is greater than 0.5 and that is ur ans

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