A logarithm is a mathematical operation that determines how normally a sure number, known as the base, is improved by itself to reach every other number.
A function (including y = loga x or y = ln x) this is the inverse of an exponential function (consisting of y = ax or y = ex) in order that the impartial variable seems in a logarithm.
There are essential motives to use logarithmic scales in charts and graphs. the primary is to reply to skewness toward massive values; i.e., cases in which one or a few points are a good deal large than the bulk of the facts. the second one is to show percent alternate or multiplicative factors.
A logarithm is electricity to which a number of should be raised in order to get a few other varieties (see section 3 of this Math overview for greater approximately exponents). as an instance, the bottom ten logarithm of a hundred is two, due to the fact ten raised to the energy of two is one hundred: log 100 = 2.
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