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>>
CBSE XII
>>
Math
>>
Application of Derivatives
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Q)
The function
f
(
x
)
=
−
x
2
+
sin
x
is always increasing in
(
a
)
(
−
π
2
,
π
2
)
(
b
)
(
0
,
π
4
)
(
c
)
(
π
4
,
π
2
)
(
d
)
(
−
π
3
,
π
3
)
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