Question 798563
{{{ log( 2, x ) + log( 4, y ) + log( 4, z ) }}}
{{{ log( 3, y ) + log( 9, z ) + log( 9, x ) }}}
{{{ log( 4, z ) + log( 16, x ) + log( 16 , y) }}}
***
{{{log(2,x)+log(4,y)+log(4,z)}}}
change to base 2
{{{log(2,x)+(log(2,y)/log(2,4))+(log(4,z)/log(2,4))}}}
{{{log(2,x)+(log(2,y)/2)+(log(4,z)/2)}}}
{{{log(2,x)+(log(2,y)/2)+(log(4,z)/2)=log(2,(xy^(1/2)z^(1/2)))}}}
..
{{{log(3,y)+log(9,z)+log(9,x)}}}
change to base 3
{{{log(3,y)+(log(3,z)/log(3,9))+(log(3,x)/log(3,9))}}}
{{{log(3,y)+(log(3,z)/2)+(log(3,x)/2)}}}
{{{log(3,y)+(log(3,z)/2)+(log(3,x)/2)=log(3,(yz^(1/2)x^(1/2)))}}}

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I will let you do the 3rd problem.