If x a y then y log a x. Use logamn logam logan. To illustrate take the number 10000 to base 10.
We seek to calculate 2345 Using rule 3 log2345 345 log 2 We already memorized that log 2 030103 so this is 345 030103 10385535.
This video is about Calculating Logarithms. Logarithms made it easy for people to carry out otherwise difficult operations eg. 4 loga x2 1 loga x Also x x½. This is because 10000 is equivalent to 10 to the power of 4.