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# indices

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Intern
Joined: 02 Jun 2006
Posts: 28

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24 Aug 2007, 23:06
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

solve for X & y : x^y = y^x & y = x^2 - explain

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Director
Joined: 26 Feb 2006
Posts: 900

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24 Aug 2007, 23:15
yasmeen wrote:
solve for X & y : x^y = y^x & y = x^2 - explain

x^y = y^x
x^(x^2) = (x^2)^x
x = 2

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VP
Joined: 08 Jun 2005
Posts: 1141

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25 Aug 2007, 01:57
Himalayan wrote:
yasmeen wrote:
solve for X & y : x^y = y^x & y = x^2 - explain

x^y = y^x
x^(x^2) = (x^2)^x
x = 2

Kudos [?]: 257 [0], given: 0

VP
Joined: 09 Jul 2007
Posts: 1098

Kudos [?]: 149 [0], given: 0

Location: London

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25 Aug 2007, 02:33
yasmeen wrote:
solve for X & y : x^y = y^x & y = x^2 - explain

x^(x^2)=x(X^2)^x
drop the vase
x^2=2x
x^2-2x=0
x(x-2)=0
x=0
and
x=2

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Re: indices   [#permalink] 25 Aug 2007, 02:33
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# indices

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