ALISON BOWLING LOGARITHMS
LOGARITHMS (BASE 10) 10 0 = 1log 10 1 = = 10log = = 100log = = 1000log = =.1log 10.1 = =.01log = =.001log = =.0001log = -4 Note: Log x where X <= 0 is undefined
LOGARITHMS (BASE E) Euler’s number, e = …. e x : exponential function e is of eminent importance in mathematics (alongside ) e 1 = ….ln (2.718) = 1 e 2 = 7.39ln (7.39 ) = 2 e -2 = 1/7.39 =.135ln (0.135) = -2 In general, if y = e x thenln (y) = x
PROPERTIES OF LOGARITHMS