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= log 2^3 + log 3
= 3 x log 2 + log 3
= 3 x 0,3010 + 0,4771
= 0,9030 + 0,4771
= 1,3801
b. log 18 = log ( 2 x 3^2 )
= log 2 + 2 x log 3
= 0, 3010 + 2 x 0,4771
= 0,3010 + 0,9542
= 1,2552
c. log 1,5 = log 3/2
= log 3 - log 2
= 0,4771 - 0,3010
= 0,1761
d. log 90 = log (2 x 3^2 x 5)
= log 2 + 2 x log 3 + log 5
= 0,3010 + 2 x 0,4771 + 0,6990
= 0,3010 + 0,9542 + 0,6990
= 1,9542
e. log 45 = log (3^2 x 5)
= 2 x log 3 + log 5
= 2 x 0,4771 + 0,6990
= 0,9542 + 0,6990
=1,6532