College Algebra & Trigonometry, 2018a

162 CHAPTER 3. EXPONENTS AND LOGARITHMS
Example
Express the given statement using exponential notation:
log100=2
If log100=2, then 10 2 = 100
The notation ln N = x is typically used to indicate a logrithm to the base e. This
means that:
Example
ln N = x → e x = N
Express the given statement using exponential notation:
ln 15 ≈ 2.708
If ln 15 ≈ 2.708, then e 2.708 ≈ 15
In some cases, we would want to change an exponential statement into a logarithmic
statement.
Exmple
Express the given statement using logarithmic notation:
12 4 =20, 736
If 12 4 =20, 736 then log 12 20, 736 = 4