Question

Diketahui log 2 = 0,3010; log 3 = 0,4771dan log 7 = 0,8451 tentukan:
a. log 18
b. log 21
c. log 10,5
d. log 1/7

Answer 1

A) log 18 = log 2 + log 3 + log 3 = 0,301 + 2(0,477) = 1,255

b) log 21 = log 3 + log 7 = 0,477 +0,845 = 1,322

c) log 10,5 = log 3 + log 7 / 2 = 0,477 + 1/2(0,845) = 0,422

d) log 1/7 = log 7^-1 = -1 (0,845) = - 0,845
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