We went over problems involving logarithms.
Log has a base of 10 if nothing is written and ln has a base of e. e is ~ 2.7, it’s a number with a lot of significance, kind of like pi.
log 10 = 1
log 100 = 2
You can think about it as a base, an exponent, and a solution.
e^x and lnx are inverse functions, meaning they can counteract each other, like sin (sin^-1(x))
Sometimes doing some algebra initially before jumping into the logarithms is helpful.
Looked a bit at the shape of lnx.