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Byju's Answer
Standard XII
Mathematics
Different Types of Intervals in Inequality
If x ∈ R and ...
Question
If
x
∈
R
and
x
+
x
2
+
x
4
<
7
, then
x
lies in
A
(
−
∞
,
4
)
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B
(
−
∞
,
4
]
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C
[
4
,
∞
)
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D
(
4
,
∞
)
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Solution
The correct option is
A
(
−
∞
,
4
)
x
(
1
+
1
2
+
1
4
)
<
7
⇒
7
x
4
<
7
⇒
x
<
4
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1
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