Please help!! If you aren't going to actually help, please don't even answer.

#1

Change of base formula is given by

#2

Two most common bases are

As general logarithm has base 10 and natural has base e hence these two are most used

#3

We use e as base

i'm going to search it

step-by-step explanation:

a negative exponent is translated as follows:

so, we have