Question

Find the domain of each function
1. f(x) = x + 1
2. f(x) = x / x
3. f(x)
X+4 X+2
ក្រុមចមតែមកបកអាន
AMINATIVITIES​

Answer 1

Answer:

f(x)=

4−x

2

Clearly, f(x) assumes real values for all x satisfying

⇒4−x

2

≥0

⇒−(x

2

−4)≥0

⇒x

2

−4≤0

⇒(x−2)(x+2)≤0

∴x∈[−2,2]

Hence, Domain (f) = [−2,2]