How to find the value of log 25 and log15 Answer by MathLover117568 Show Source. Log525 x log 5 25 x. Log 10 100 log 10 1000 log 10 100000 Step 2.
Changing the logarithm form according to the logarithm definition.
In fact one need to remember log to the base 10 for first ten numbers and it makes things lot easier. The log of 35 is somewhere between the log of 3 and 4 but somewhat above the midpoint since the log scale gets smaller as you go up. 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. 15 lies between 10 10 1 and 100 10 2 so its logarithm will lie between 1 and 2 or be 1something.