LOGARITHMS 5

If log 2= 0.3010; find the value of log 125 without using tables.

solution

log125=log(1,000 ÷8)

=log1000 –log8

= log10³ - log2³

= 3log10 - 3log2

=(3 x 1) - (3 x 0.3010)

= 3  -  0.9030

=2.097

Hence log 125 =2.097

TRY THIS……………

If log 2= 0.3010; find the value of log 250 without using tables.