Q.

If  y=a11-logaxand  z=a11-logay, then x is equal to

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a

a11+logaz

b

a12+logaz

c

a11logaz

d

a12logaz

answer is C.

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Detailed Solution

 y=a11logax
logay=11logax...........(i)
and  z=a11logay
or  logaz=11logay..........(2)
From Eqs.(i) and (ii), we get
logaz=11(11logax)=11logax
1logax=(1logaz)logax=1(1logaz)

x=a1a1logaz

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If  y=a11-logaxand  z=a11-logay, then x is equal to