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Byju's Answer
Standard XII
Mathematics
Condition for Monotonically Decreasing Function
If the functi...
Question
If the function
f
(
x
)
=
x
2
−
a
x
+
4
is monotonic increasing in the open interval
(
2
,
+
∞
)
then
a
is
A
2
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B
4
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C
1
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D
1
/
2
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Solution
The correct option is
A
4
f
′
(
x
)
>
0
for monotonically increasing function.
f
′
(
x
)
=
2
x
−
a
>
0
in
(
2
,
∞
)
⇒
a
=
4
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0
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