Question

13-18 Express the quantity as a single logarithm.
13. $2 \ln x+3 \ln y-\ln z$

Answer 1

$2 \ln x+ 3 \ln y - \ln z\\\\=\ln x^2 + \ln y^3 - \ln z\\\\=\ln(x^2 y^3) - \ln z\\\\=\ln \left( \dfrac{x^2y^3}{z} \right)$