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[Post New]14 Apr 2007 13:08:41 IST
    Subject: Re:PROGRESSION
[Up]
Asmita (475)

Blazing goIITian

Olaaa!! Perrrfect answer. 73  bad job dude!! I dont approve of this answer! 1  [130 rates]
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let a b d 1st term n ?d? be the common diff.
Then  bcoz  a1+a5+a10+a15+a20+a24=225
6a+69d=225
dividing by 3,2a+23d=75?(i)
now S24=24/2* (2a+23d)
              =12*75 [frm (i)]
              =900
 this reply: 7 points  (with 1 Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
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