Question

Help me please i’ll rate brainliest

Answer 1

Answer:

- 1.568  

Step-by-step explanation:

Let's assume that the base of the given logarithm is 10.

log m = 0.345 ⇒ $10^{0.345}$ = m

log n = 1.223 ⇒ $10^{1.223}$ = n

mn = $10^{0.345}$ × $10^{1.223}$ = $10^{1.568}$

$\frac{1}{mn}$ = $10^{-1.568}$

log $10^{-1.568}$ = - 1.568 × log 10 = - 1.568