law of logarithms
the following topic will be covered
so what is a logarithm?
2 power 4 equal to 16
logarithm is the
index value for the number
in this example log16 base 2
is 4 so the base of the index number is
the base of the
log
log actually is the reflection of the
exponent function
common log is in base 10
when given a log
equal to x then the anti log
x is equal to n
the antilog value can be compute from
the
calculator
so find the value of the following by
using calculator
to determine the value of x
we can always use antilog
or we can convert the log
in term of index form in this case
x will equal to 5 power 3
when it comes to anti log in term of
decimal
so you have to use calculator to find
the value
there are law of logarithm
you must command
law of production, of division
and law of exponent
so in this example
you can apply the law of production
find the value by using
law of law without using calculator
so you need to command all the law
expression in log to
be a single logarithm
also you need to apply all the law to
get
the final answer
so log 6
can be equal to log (2x3)
in this example all the law like
addition minus
and also the exponent law
what is photomath app?
scan the QR code it will tell you
the content and we talk about natural
log natural law is
the log base in e
represent by ln
sometimes we need to change the base
this example
show you how to prove the
log base changes
when given log
in other bases in order to use
calculator you need to change the base
10
by using the log base changes
in order to use the log base e
this is how you solve by using
calculator
press ln in your calculator
to find the log base e
it's time for quiz try to answer
all these questions and check your
answer
at the end of the video
you are welcome to email to me
by scanning the QR code here
you are so welcome to subscribe my
youtube channel
or comment or like my video
this is the end thank you for viewing
and the answer for quiz
Bye
Terima Kasih
chapter 4.3
