Question

1) O domínio da função

f(x) = log₂ (x - 5).

a) D= x ER/x>5
b) D=xER/x>-5
c) D= x ER/x>7
d) D= x ER / x>-7​

Answer 1

$\boxed{\begin{array}{l}\sf \ell og_2(x-5)\\\sf x-5>0\\\sf x>5\\\sf D=\{x\in\mathbb{R}/x>5\}\\\huge\boxed{\boxed{\boxed{\boxed{\sf\red{~\maltese}\blue{alternativa~a}}}}} \end{array}}$