Sunday 30 June 2013

LOGARITHMS - 4


Evaluate Log100000 +  log 0.01 + log3243

Solution

= Log100000 +  log 0.01 + log3243

= Log105 +  log 10-2 + log33-5

= 5Log10 +  (-2log 10) + (-5log33)
= (5x1) + (-2x1) + (-5x1)
= 5 + (-2) + (-5)
= -2


Hence Log100000 +  log 0.01 + log3243 = -2

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