The logarithm inherits certain useful properties directly. 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. If xz y then z is the answer to the log of y with base x ie log x y z.
In other words x needs to be raised to the power z to produce y.
X log b-1 y b y log b x y y log b x. The log operator allows us to solve for X and write an equivalent expression as log 100 X. It is easiest to determine the logarithm of a power of 10 because the solution is equal to the power of the exponent. Click the LOG button and enter the first value in the set.