Question

determine o domínio da função definida por :

c) f(x)=✓x-2/x-3
d) f(x)=x/x²-4
e) f(x)=x+2/2x

Answer 1

c)

x-2≥0
x≥2

x-3≠0
x≠3

D={x∈R/x≥2 e x≠3}

d)

x/[(x+2)(x-2)]

(x+2)(x-2)≠0

x+2≠0
x≠-2

x-2≠0
x≠2

D={x∈R/x≠-2 e x≠2}

e)

x+2/2x

2x≠0
x≠0

D={x∈R/x≠0}