Question

Se log2(x + 10) = 1+log2 x, então log x é:
(A) 2
(B) 1
(C) 4
(D) 1⁄2
(E) 1⁄4

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{log_2\:(x + 10) = 1 + log_2\:x}$

$\mathsf{log_2\:(x + 10) = log_2\:2 + log_2\:x}$

$\mathsf{log_2\:(x + 10) = log_2\:2x}$

$\mathsf{x + 10 = 2x}$

$\mathsf{2x - x = 10}$

$\boxed{\boxed{\mathsf{x = 10}}}$