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# How to Find Log and Antilog

The manner logarithm is described it actually looks little dicey as most of students find the logarithm little different from other form of solving. This of course involves use of tables and making each of these into a pattern before the solving could begin.
The first thing one has to learn is to know how to find the base to and the value and finally the answer. The basic sign rules come under base to or basically the number that is getting used while the value refers to the value used from logarithm table for the base.
For instance in Log_m (n) = A ‘A’ refers to answer, ‘m refers to the base and (n) refers to value. Like what we use for logarithm the antilogarithm also has the base and values but unlike logarithm the antilogarithm gives opposite value.

The logarithm usually is used for exponential values or values which covers numbers like pie. These of course varies as we might end up with e^x where x could be any rational number.
Now another important thing to be noted is that the calculation of logarithm involves scientific notation and when the answer is found it comes out as non scientific notation. Scientific notation is basically putting decimal after one digit only.
Similarly we could find the antilog as well by using antilog table. And as expected we use non scientific notation for antilog and get the answer in scientific notations. Sometimes we come across negative numbers and in those cases we need to use the whole number next to the given number and then subtract it. So this also gives a basic idea that logarithms can never be negative numbers while antilogarithms can have negative numbers.

The use of logarithms ad antilogarithms comes very handy when we calculate for pH of some chemical substance or go for some basic calculations involving the exponential values. Usually the pH of chemical substance use logarithms and antilogarithms as well as big calculations involving exponents like in nuclear physics or nuclear chemistry. These are well known fields where the log table comes handy and once these topics are in grip a lot of big calculations become easier and one could proceed without the use of a calculator.

For any further help one could always log into the website of any online tutoring and get instant help from subject experts who will help understand these basics of logarithm and antilogarithm.

From Wikipedia

Web log analysis software

Web log analysis software (also called a web log analyzer) is a simple kind of Web analytics software that parses a log file from a web server, and based on the values contained in the log file, derives indicators about who, when, and how a web server is visited. Usually reports are generated from the log files immediately, but the log files can alternatively be parsed to a database and reports generated on demand.

Features supported by log analysis packages may include "hit filters", which use pattern matching to examine selected log data.

## Common Indicators

• Number of visits and number of unique visitors
• Visits duration and last visits
• Authenticated users, and last authenticated visits
• Days of week and rush hours
• Domains/countries of host's visitors
• Hosts list
• Number total pageviews
• Most viewed, entry and exit pages
• Files type
• OS used
• Browsers used
• Robots
• HTTP referrer
• Search engines, key phrases and keywords used to find the analyzed web site
• HTTP errors
• Some of the log analyzers also report on who's on the site, conversion tracking, visit time and page navigation.

Question:How come there's no ANTILOG on a scientific calculator? For example, if I use a printed out LOGARITHM TABLE then I can look up the logs and add/subtract them, then find out the actual number by looking up the reverse of the logarithm. But I only see the LOG button on calculators and never the anti log or reverse log (unlike Sin and Sin-1, etc.). Why is this? Hits palm on head (palm, not Palm :-) You're absolutely right! Sheesh. I totally just overlooked that. Thanks. I use RPN as well (can't stand so-called algebraic). All my real and iPhone/iPad/Mac calculators are RPN :-) Thanks!

Answers:Depends on the calculator. The Windows calculator can do base10 anti-log of x by entering: x, inverse, log. My HP just does the same anti-log by entering: 10, x, y^x (it's an RPN calculator). Since space is limited on a calculator, the designers must optimize for the functions they expect to be most useful. I guess since y^x or x^y function is really, really useful and can return the same result, some opt not to add redundant inverse log or anti-log function for the benefit of people who don't quite understand what a log is.

Question:In my book it is given that above is equal to log 4 to base 2. How come. I have proved log a log b = log ab This stuff simple dives over me. I mean can u prove anythin like that?

Answers:It appears that they used the "chage of base" formula that says the log a to the base b = (log a) / (log b) so you can rewrite this problem as (log 4) / (log 5) * (log 5) / (log 2) when you multiply, the log 5 on top will cancel with the log 5 on bottom leaving (log 4) / (log 2). if you take that answer and use the change of base formula again, you will get log 4 with a base of 2 which is actually just 2. I hope this helps and wasn't too confusing, Rousey

Question:Given f(x)=log (base 2) (-x+5) and g(x)=-x Find (f+g)(x) y=log(base 2)(-x+5)-x I don't know how to turn that into an equation from which I can graph