find the domain and range of f(x)=√x2+4
Answers
Answered by
0
Answer:
planation:
f
(
x
)
=
√
x
2
−
4
The best and fastest way is to learn how do parental functions look like and how does the formula look like and then use it.
The domain: square root must be greater or equal to 0:
x
2
−
4
≥
0
⇒
(
x
−
2
)
(
x
+
2
)
≥
0
That happens only when f(x)>0......everything that is above x axis
Answered by
0
Step-by-step explanation:
The domain: (−∞,−2]⋃[2,∞) the range: [0,∞). Explanation: f(x)=√x2−4.
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