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Q.

If  logxbc=logyca=logzab ,  then  xa.yb.zc=

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a

2

b

a b c

c

 1

d

0

answer is A.

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Detailed Solution

logx=k(bc)

logy=k(ca)

logz=k(ab)

Now  log(xa.yb.zc)=alogx+blogy+clogz

=ak(bc)+bk(ca)+ck(ab)

=k(abac+bcab+acbc)

=0

log(xa.yb.zc)=0=1

So  xa.yb.zc=1

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