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![[Post New]](/templates/default/images/icon_minipost_new.gif) 1 May 2007 22:48:48 IST
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sir, 1) how to find [0 ] ò[e ] loget/(1+t)dt ? 2)if [Ö2]ò[x ]dx/(x Ö(x2-1)) =P/2, then x=? sir, isn't it -Ö2 , but the options were- a) Ö3/2 b)2 c)2Ö2 d)1/2
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1 May 2007 23:00:13 IST
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yup....da answer is - square rt odf 2.......so da opions wer wrong............
don worry..........
cheers
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2 May 2007 09:40:23 IST
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EDITED
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Science is vision multiplied!
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2 May 2007 10:16:50 IST
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Here is the answer for the second question of ann .
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Science is vision multiplied!
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3 May 2007 13:30:34 IST
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Dear Ann,
Please ask one ques. at a time for the experts to answer.
Cheers :)
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3 May 2007 13:42:13 IST
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Hey VINOD
 logxdx = xlogx -x
u did it rite in d ans though......
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3 May 2007 16:23:15 IST
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sory writing mistake !!! I have edited it now !!!
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3 May 2007 16:38:20 IST
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u are asking the question that came in aieee 2007
it is given that
F(x)=f(x)+f(1/x)
differentiating the eqn v get
F'(x)=f'(x) - f'(1/x)
and f'(x)=logx/1+x
put and u will get F'(x)=logx/x
and f(1)=0
therefore F(x)=logx^2/2
and
F(e)=1/2
in ma exam i did everything correct until f(1)=0
and then a blunder
i took F(x)=logx and lost 4 marks................................
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5 May 2007 23:22:46 IST
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Hello friends, vinod has solved second query correctly and harshiiit way to solve the first query is right. vinod why you have converted sec(3 /4) into 1/cos(3/4). You can directly use the properties as
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5 May 2007 23:30:45 IST
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No sir, i actually wanted to be a bit more clear ! i mean i am aware abt that property, but just used only sin and cos ! Thank u sir.
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