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Byju's Answer
Standard XII
Mathematics
Roster Form
The roster fo...
Question
The roster form of the set
{
x
:
x
is a real number and
x
3
=
3
x
2
−
2
x
}
A
{
1
,
2
}
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B
{
0
,
1
,
2
}
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C
{
1
,
2
,
ϕ
}
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D
{
0
,
ϕ
,
1
,
2
,
3
}
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Solution
The correct option is
B
{
0
,
1
,
2
}
x
3
=
3
x
2
−
2
x
⇒
x
3
−
3
x
2
+
2
x
=
0
⇒
x
(
x
−
1
)
(
x
−
2
)
=
0
⇒
x
=
{
0
,
1
,
2
}
∴
Roster form
=
{
0
,
1
,
2
}
Suggest Corrections
0
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