find the range of the function, f(x)=√x -1
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Domain and range
f
(
x
)
=
√
9
−
x
2
y
=
√
9
−
x
2
√
9
−
x
2
≥
0
9
−
x
2
≥
0
x
2
≤
9
x
≤
+
−
3
x
∈
[
−
3
,
3
]
y
2
=
9
−
x
2
x
2
=
9
−
y
2
x
=
√
9
−
y
2
9
−
y
2
≥
0
y
2
≤
9
y
∈
3
,
−
3
y
=
+
v
e
∵
y
∈
[
0
,
3
]
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