Question 763652
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Let's start from the 1st equation and keep expanding it.

Remember the identity: {{{highlight((x^m)^n = x^(m*n))}}}

{{{a = b^x}}}

{{{a = (c^y)^x}}}    ===> since b = c^y

So {{{a = c^(x*y)}}} 

Since c = a^z,

{{{a = (a^z)^(x*y) = a^(x*y*z)}}}

So {{{x*y*z = 1}}}

Hope this helps. Please mail me if it's still not clear.

:)
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