Bonjour,
63.
1.
a) 8x - 4 = 0
<=> 8x = 4
<=> x = 4/8
<=> x = 1/2
b) 8x - 4 ≥ 0
<=> 8x ≥ 4
<=> x ≥ 4/8
<=> x ≥ 1/2
2.
a. g(x) = [tex] \frac{1}{8x-4} [/tex] -> x ≠[tex] \frac{1}{2} [/tex];
Dg = ]- [tex]\infty[/tex]; 0[ U ]0; + [tex]\infty[/tex] [
b. h(x) = [tex] \sqrt{8x-4} [/tex] -> x ≠[tex] \frac{1}{2} [/tex];
Dh = ]0; +[tex]\infty[/tex] [
