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Byju's Answer
Standard XII
Mathematics
Summation by Sigma Method
If logarithm ...
Question
If logarithm of
1
81
to the base
27
is
−
m
3
, then the value of
m
is equal to
A
1
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B
5
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C
7
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D
4
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Solution
The correct option is
D
4
log
27
1
81
=
x
In exponent form
1
81
=
27
x
1
3
4
=
3
3
x
3
−
4
=
3
3
x
x
=
−
4
3
log
27
1
81
=
−
4
3
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