LOGARITHMS 1

Evaluate Log10000 +  log 0.001 -  log 0.00000001

Solution

= Log10000 +  log 0.001 -  log 0.00000001

= Log10⁴ +  log 10^-3 – log 10^-8

= 4Log10 + (-3 log 10) – (-8log 10)

= (4x1) + (-3x1) - (-8x1)

=4 + (-3) – (-8)

= 4 – 3 + 8

=9

Hence Log10000 +  log 0.001-  log 0.00000001 = 9

TRY THIS……………………… 

Evaluate Log100 +  log 0.0000001 -  log 0.00000001