Increasing Intervals of Function (Jee Mains) | ExamDuo
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Application of Derivates
Medium
Increasing Intervals of Function
If
5
f
(
x
)
+
4
f
(
1
x
)
=
x
2
−
2
,
∀
x
≠
0
and
y
=
9
x
2
f
(
x
)
, then
y
is strictly increasing in :
Ask about this question
SELECT ONE OPTION
A
(
0
,
1
√
5
)
∪
(
1
√
5
,
∞
)
B
(
−
1
√
5
,
0
)
∪
(
1
√
5
,
∞
)
C
(
−
1
√
5
,
0
)
∪
(
0
,
1
√
5
)
D
(
−
∞
,
1
√
5
)
∪
(
0
,
1
√
5
)
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