express 3ln(r)- 5ln(s)+ 7ln (t) as a single logarithm.

Answer 1

3ln(r)- 5ln(s)+ 7ln (t)

which is

ln(r)^3- ln(s)^5+ ln(t)^7

which is

ln[(r)^3 x (t)^7 /(s)^5]