Question

Determine em cada caso :
a) log9 b= 1/2

b)log27 (x+5)= 1/3

Answer 1

a)

log ₉ b = 1/2
9¹/² = b
b = √9
b = 3

b)

log ₂₇ (x+5) = 1/3
x + 5 = 27¹/³
x + 5 = ∛27
x + 5 = 3
x = 3 - 5
x = -2