bantu jawab ya nomor 5a -d mksih

log 12 = log (4x3)
= log 4 + log 3
= log 2^2 + log 3
= 2.log 2 + log 3
= 2x 0,3010 + 0,4771
= 0,6020 + 0,4771
= 1,0791
b) log 81
= log 3^4
= 4.log 3
= 4x0,04771
= 1,9084
c) log (25/4)
= log (100/16)
= log 100 - log 16
= 2 - log 2^4
= 2 - 4.log 2
= 2 - 4x0,3010
= 2 - 1,2040
= 0,7960
d) log akar pangkat 3 dari 150
= log (150)^1/3
= 1/3.log 150
= 1/3 log (300/2)
= 1/3( log 300 - log 2)
= 1/3 (log.3.100 - log 2)
= 1/3 (log 100 + log 3 - log 2)
= 1/3 ( 2 + 0,4771 -0,3010)
= 1/3 ( 2,1761)
= 0,7254