Question

formula of log(x) in logarithm ​

Answer 1

The product rule. for any numbers a and b. Starting with the log of the product of x and y, ln(xy), we'll use equation (3) (with c=xy) to write eln(xy)=xy. Then, we'll use equation (3) two more times (with c=x and with c=y) to write xy in terms of ln(x) and ln(y), eln(xy)=xy=eln(x)eln(y).