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logarithms
1.
2.
3. What are logarithms
The logarithm of a number is the
exponent to which another fixed value,
the base, must be raised to produce
that number.
4. For example
The logarithm of 10000 to base 10 is 3, because 10 to the
power 4 is 10000: 10000 = 10 × 10 × 10 × 10 = 104
5. Logarithms were introduced
by John Napier in the early
17th century as a means to
simplify calculations.
6. The logarithm of a positive real number x with respect
to base b is the exponent by which b must be raised to
yield x.
log b x = y
7. The logarithm to base 10 (b = 10) is called the
common logarithm and has many applications in
science and engineering.
For example:
log 100 =2
i.e., log10100 = 2
8. Logarithms have many applications inside and outside
mathematics.
Logarithms occur in several laws describing human
perception in Psychology.
Natural logarithms are closely linked to counting prime
numbers, an important topic in number theory.
Logarithms arise in probability theory.
9. Logarithms are related to musical tones and intervals.
Logarithms occur in definitions of the dimension of
fractals.
Logarithms are useful in many
ways.
They were rapidly adopted by
navigators, scientists, engineers,
and others to perform computations
more easily.