49
Subhomoy Bakshi
·2011-06-09 15:41:28
I should have been in 11! [2]
hehe! :D
1
Ricky
·2011-06-09 20:40:14
Seems the XI people have run out of adrenaline :)
36
rahul
·2011-06-10 13:57:38
the quesstion isnnt clear...
please write it correctly....
hving confusion wth the terms...
49
Subhomoy Bakshi
·2011-06-10 23:18:59
the question is:
Solve for x:
\frac{\sqrt{x}+\frac{1}{\sqrt{x}}-\sqrt{2}}{\sqrt{x}+\frac{1}{\sqrt{x}}}=\frac{\sqrt{x}+\frac{1}{\sqrt{x}}}{\sqrt{x}+\frac{1}{\sqrt{x}}+3\sqrt{2}}
21
Arnab Kundu
·2011-06-10 23:28:13
Replace \sqrt{x}+\frac{1}{\sqrt{x}} by a
The equation becomes \frac{a-\sqrt{2}}{a}= \frac{a}{a+ 3\sqrt{2}}
Simplifying and rearranging a = \frac{6}{2\sqrt{2}} = \frac{3}{\sqrt{2}}
So, \sqrt{x}+\frac{1}{\sqrt{x}} = \frac{3}{\sqrt{2}}
Solving the quadratic for \sqrt{x} we get , \sqrt{x} = \frac{\frac{3}{\sqrt{2}}\pm \sqrt{\frac{17}{2}}}{2}
Squaring it, we get the value of x
7
Sigma
·2011-06-30 21:52:58
THe qus was too easy @NISHANT sir..
Even a class 9 student can do it, leave alone 11.what was there in dis qs?
will it ever come in RMO?...lol...