How do you solve #logx+log(x+15)=2#?
2 Answers
Feb 4, 2015
Supposing the base of the log being
So you get (using also the definition of logarithm):
Feb 4, 2015
There is an error.
The arguments of the logarithmics have to be positive.
So you had to put two condition:
they drive us to
So, one of the solution you found (