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Indian Institute of Foreign Trade 2016 Solved Paper
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© examsnet.com
Question : 3
Total: 123
Find the value of x which satisfies the following equation
4
log
7
(
x
−
8
)
=
log
3
81
8
18
20
None of the above
Validate
Solution:
(
d
)
Here
,
4
log
7
(
x
−
8
)
=
log
3
81
⇒
4
log
7
(
x
−
8
)
=
log
3
(
3
4
)
⇒
4
log
7
(
x
−
8
)
=
4
⇒
log
7
(
x
−
8
)
=
1
⇒
x
−
8
=
7
⇒ x = 15
© examsnet.com
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