Question

Dik log2 = 0,3010; log3 = 0,4771 dan log7 = 0,8451 tentukan :
a. log18
b. log 21
c. log 10,5
d. log 1/7

Answer 1

A. log 18 = log 3.3.2 = log 3 + log 3 + log 2 = 1.2552
b. log 21 = log 3.7 = log 3 + log 7 =  1.3222
c. log 10.5 =  log 3.7/2 = 1.3222 - 0.3010 = 1.0212
d. log 1/7 = log 1 - log 7 = 0 - 0.8451 = -0.8451