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Byju's Answer
Standard X
Mathematics
Arithmetic Progression
If logba+lo...
Question
If
log
b
a
+
log
c
a
+
log
a
b
+
log
a
c
+
log
b
c
+
log
c
b
=
3
(where
a
,
b
,
c
are different positive real numbers
≠
1
), then find the value of
a
b
c
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Solution
(
log
a
)
2
log
b
log
c
+
(
log
b
)
2
log
a
log
c
+
(
log
c
)
2
log
a
log
b
=
3
⇒
(
log
a
)
3
+
(
log
b
)
3
+
(
log
c
)
3
−
3
log
a
log
b
log
c
=
0
⇒
log
a
+
log
b
+
log
c
=
0
(
a
s
a
,
b
.
c
,
a
r
e
d
i
s
t
i
n
c
t
)
⇒
log
a
b
c
=
0
⇒
a
b
c
=
1
Ans: 1
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