Question

a) logx 1/7 = -1
b) logx 8 = -3
c) logx 81 = 4/3

Answer 1

Resposta:

a) $7$

b) $\dfrac{1}{2}$

c) $27$

Explicação passo-a-passo:

$log_x \:\dfrac{1}{7} = -1\rightarrow x^{-1} = \dfrac{1}{7}\rightarrow x = 7$

$log_x \:8 = -3\rightarrow x^{-3} = 8\rightarrow x = \dfrac{1}{2}$

$log_x \:81 = \dfrac{4}{3}\rightarrow x^{\dfrac{4}{3}} = 81\rightarrow x = 27$