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Revision as of 17:10, 31 May 2021

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Description:: Base-10 logarithm of x.

The function of log(x) will never touch the y-axis.
Groups:: Math

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Posted on 23:14, 16 Jun 2014
ffur2007slx2_5: To clarify: y = 10 ^ x // x = log y People use logarithm at the purpose of simplifying multiplication via exponents plus years before. 23456*45634 = 1.07039e+009 log 23456 = 4.37025; log 45634 = 4.65929; (log 23456) + (log 45634) = 9.02954 10^((log 23456) + (log 45634)) = 10 ^ 9.02954 // same as 23456*45634 As modern usage, for instance, to evaluate another exponent when multiple is known (Which magnitude is 4 times stronger than 8.3 earthquake?): //_Unknown = log x; 8.3 = log y // x = 10 ^_Unknown; y = 10 ^8.3 //x/y = (10 ^_Unknown)/(10 ^8.3) = log 4 // x/y = _Unknown – 8.3 = 0.6 //_result = 8.9 magnitude _result = (log 4) + 8.3

@@ Line 1: / Line 1: @@
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-| Base-10 logarithm of x.
+|descr= Base-10 logarithm of x. [[File:A3 logx.jpg|thumb|The function of log(x) will never touch the y-axis.]]
-| '''log''' x
+|s1= '''log''' x
-|p1= x: [[Number]]
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-| [[Number]]
+|r1= [[Number]]
-|x1= <code>_log = [[log]] 10; // 1</code>
+|x1= <code>_log = [[log]] 10;</code>
+|x2= <code>_log = [[log]] [[abs]] -10;</code>
+|x3= <code>[[finite]] [[log]] -10; {{cc|Returns false}}</code>
-| [[Math Commands]], {{Wikipedia|Logarithm|Logarithm}}
+|seealso= [[Math Commands]], {{Wikipedia|Logarithm|Logarithm}}
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 <dt class="note">[[User:ffur2007slx2_5|ffur2007slx2_5]]</dt>
 <dd class="note">
-(A3 1.20) To clarify:
+To clarify:
 <code>y = 10 ^ x // x = [[log]] y</code>
 People use logarithm at the purpose of simplifying multiplication via exponents plus years before.