Saturday, 28 April 2018

LOGARITHMS 3


Evaluate Log100,000,000 +  log 0.00001 + log3243

Solution

= Log100,000,000  +  log 0.00001 + log3243

= Log108 +  log 10-5 + log335

= 8Log10 +  (-5log 10) + (5log33)    [since logaa= nlogaa]

= (8x1) + (-5x1) + (5x1)             [since logaa = 1]

= 8 + (-5) + (5)

= 8

Hence Log100,000,000 +  log 0.00001 + log3243 = 7

TRY THIS...............................



Evaluate Log10,000,000,000 +  log 0.01 + log32187

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