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What does it mean in lg mathematics?
Logarithm based on 10.

In mathematics, lg stands for logarithm with the base of 10, which is also called ordinary logarithm. Logarithmic function is a basic elementary function, which is used to describe the inverse operation of exponential operation. A number n can be expressed as the x power of a (where a >;; 0 and a≠ 1), then the logarithm of n based on a is the number x, and it is recorded as x=logaN. In lg function, the base a is 10, and lgN represents the logarithm of n with the base 10. This function is usually used to solve exponential and logarithmic problems in mathematics and science.