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Byju's Answer
Standard XIII
Mathematics
Fundamental Laws of Logarithms
The set of al...
Question
The set of all values of
x
satisfying
x
log
x
(
1
−
x
)
2
=
9
is
A
A subset of
R
containing
N
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B
A subset of
R
containing
Z
(set of all integers).
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C
Is a finite set containing at least
2
elements.
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D
A finite set.
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Solution
The correct option is
D
A finite set.
x
log
x
(
1
−
x
)
2
=
9
1
−
x
≠
0
⇒
x
≠
1
Also,
x
>
0
x
log
x
(
1
−
x
)
2
=
9
(
1
−
x
)
2
=
9
1
−
x
=
±
3
⇒
x
=
4
or
x
=
−
2
∴
x
=
4
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0
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