Logrithm formula

Formulae of Logarithm

  • loga mn = loga m + loga n
  • loga m/n = loga m – loga n
  • loga mn = n loga m
  • loga m= logb m × loga b
  • loge m = 2.3026 log10 m
  • log10 m = 0.4343 loge m

Logrithmic Series

  • loge ( 1+x ) = x – x2/2 + x3/3 – x4/4 +……
  • loge ( 1-x ) = -[x + x2/2 + x3/3 + x4/4 +……]
  • loge ( 1+x ) / ( 1-x ) = 2 [x + x3/3 + x5/5 +……]