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![[Post New]](/templates/default/images/icon_minipost_new.gif) 18 Apr 2008 12:34:05 IST
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Wat will de domain of f(x) in 2x +2y=2 ? Plz Do Xplain.RATES ASSURED
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lov thyself ,world'll luv u. |
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18 Apr 2008 12:52:55 IST
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Can no Goiitien Ans dis Question
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lov thyself ,world'll luv u. |
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18 Apr 2008 13:00:36 IST
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...write this as..
2^y = 2 - 2^x...
now take log..( any valid base ..lets take e..)
ylog2 = log ( 2 - 2^x)..
y = log ( 2 - 2^x) / log2..
thus domain consists of those x ...
we 2- 2^x > 0 ..
it means x<1...
thus domain is (-infinity , 1)...
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Diamonds r formed under greatest pressures..
so r the champs.
Kriteesh..
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18 Apr 2008 13:03:18 IST
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2y = 2 - 2x
take log on both sides
ylog2 = log(2-2x)
y=log2(2-2x) ...........( i think u got this step loga/logb = logba)
Now for log to be defined,
2 - 2x >0
that implies 2x < 2
That implies x belongs to (-inf,1)
~Cheerio!!!
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Talk less work more!! {To be simplistic and gain respect}
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2x + 2y = 2 => 2x-1 + 2y-1 = 1 now both the terms are positive so 2x-1 < 1 => 2x-1 < 20 => x-1<0 => x<1. dont u think this is simple.
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18 Apr 2008 19:36:09 IST
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Thanks Guys .
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lov thyself ,world'll luv u. |
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