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Byju's Answer
Standard XII
Mathematics
Law of Reciprocal
The solution ...
Question
The solution set of
1
x
2
−
9
≥
0
is
A
(
−
3
,
3
)
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B
[
−
3
,
3
]
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C
(
−
∞
,
−
3
]
∪
[
3
,
∞
)
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D
(
−
∞
,
−
3
)
∪
(
3
,
∞
)
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Solution
The correct option is
D
(
−
∞
,
−
3
)
∪
(
3
,
∞
)
1
x
2
−
9
≥
0
⇒
x
2
−
9
>
0
⇒
(
x
+
3
)
(
x
−
3
)
>
0
∴
x
∈
(
−
∞
,
−
3
)
∪
(
3
,
∞
)
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Law of Reciprocal
Standard XII Mathematics
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