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add logarithms. It is called a common logarithm. The multiplication rule of logarithms applies when we are adding two logarithms together that have.
Log 10 3 7 log 10 3 log 10 7 Logarithm quotient rule. Logarithms are the inverses of exponents. X 10 03987869 10 613.
Parentheses are sometimes added for clarity giving lnx log e x or logx.
The logarithm of the multiplication of x and y is the sum of logarithm of x and logarithm of y. And this comes straight out of the exponent properties that if you have two exponents two with the same base you can add the exponents. In order to calculate log-1 y on the calculator enter the base b 10 is the default value enter e for e constant enter the logarithm value y and press the or calculate button. The rule is that you keep the base and add the exponents.