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Byju's Answer
Standard XII
Mathematics
Definition of Functions
Find the rang...
Question
Find the range of
f
(
x
)
=
√
1
−
√
x
2
−
6
x
+
9
.
Open in App
Solution
f(x) =
√
1
−
√
x
2
−
6
x
+
9
f(x) =
√
1
−
√
(
x
−
3
)
2
( in square root only positive quantities are defined so maximum value of
√
(
x
−
3
)
2
we can take 1 when x=4,-1 and mininmum value of
√
(
x
−
3
)
2
we can take is 0 when x=3)
so when
√
(
x
−
3
)
2
=1 than f(x) will be minimum and value =0
and when
√
(
x
−
3
)
2
=0 than f(x) will be maximum and value=1
so range of f(x) is [0, 1].
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