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# indices

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indices [#permalink]  24 Aug 2007, 22:06
solve for X & y : x^y = y^x & y = x^2 - explain
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Re: indices [#permalink]  24 Aug 2007, 22:15
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
VP
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Re: indices [#permalink]  25 Aug 2007, 00:57
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

VP
Joined: 09 Jul 2007
Posts: 1108
Location: London
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Re: indices [#permalink]  25 Aug 2007, 01:33
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
Re: indices   [#permalink] 25 Aug 2007, 01:33
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