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© examsnet.com
Question : 10
Total: 24
A function
f
:
A
→
R
is defined by the equation
f
(
x
)
=
x
2
−
4
x
+
5
where
A
=
(
1
,
4
)
. What is the range of the function?
[NDA II 2018]
(2, 5)
(1, 5)
[1, 5)
[1, 5]
Validate
Solution:
f
(
x
)
=
x
2
−
4
x
+
5
=
(
x
−
2
)
2
+
1
f
(
1
)
=
2
,
f
(
4
)
=
5
∴ Range
f
(
x
)
=
[
1
,
5
)
© examsnet.com
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