Question

função logarítmica ​

Answer 1

a)

$6x - 18 > 0 \\ 6x > 18 \\ x > \frac{18}{6} \\x> 3$

C.E {x∈lR/x>3}

b)

$6x - 14≠1 \\ 6x≠1 + 14 \\ 6x≠15 \\ x≠ \frac{15}{6} \\ x≠ \frac{5}{2}$

$6x - 14 > 0 \\ 6x > 14 \\ x > \frac{14}{6} \\ x > \frac{7}{3}$

C.E {x∈lR/5/2 ≠x>7/3}