関連ワード:  what is the derivative of log x    what is the derivative of log    what is the derivative of log base a of x    what is the derivative of log(x)    what is the derivative of log e    what is the derivative of log base 2 of x    what is the derivative of log 2x    what is the derivative of log 2    what is the derivative of log x ^ 2    what is the derivative of log base 10 x