Thread: Natural Logarithms Help Plz!

I managed to do all of my homework except this one:

How do you solve the equation: ln x - ln 5= -1??

how did you do that? You divide the numbers x and 5 together?

And after that I just find out what e^-1 is?

Originally Posted by topaz192

how did you do that? You divide the numbers x and 5 together?

it is a rule

And after that I just find out what e^-1 is?

no. leave it as e^{-1}. or you can write the answer as 5/e if you wish

ok i thought e cant get left in the answer?

Originally Posted by topaz192

ok i thought e cant get left in the answer?

it can...unless the problem specifically asked you for your answer in decimal

yea it did. so how do you get an answer? isnt e^-1?

Originally Posted by topaz192

yea it did. so how do you get an answer? isnt e^-1?

um, just plug it into your calculator

ok! thanks for your time! = )

Originally Posted by topaz192

ok! thanks for your time! = )

you're welcome