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Antilogarithms

If x is the logarithm of a given number n with a given base, then n is called the antilogarithm (antilog) of x to that base.

 

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Antilogarithms can be found using antilog tables.
 

Example
Find the value of 12.56 × 10.73 using logarithmic tables.
Solution
Let x = 12.56 × 10.73
Taking log on both sides, we get log x = log(12.56 × 10.73)
= log12.56 + log 10.73 (∴ log mn = log m + log n)
= 1.0990 + 1.0306 = 2.1296 (from log tables)
x = Antilog (2.1296) = 134.8





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