Q.

If  logxb−c=logyc−a=logza−b ,  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(b−c)

logy=k(c−a)

logz=k(a−b)

Now  log(xa.yb.zc)=alogx+blogy+clogz

=ak(b−c)+bk(c−a)+ck(a−b)

=k(ab−ac+bc−ab+ac−bc)

=0

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

So  xa.yb.zc=1

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