Jawabanmu

2014-09-02T19:03:55+07:00
A. log18
=log3 + log6
=0,4771 + log3 + log2
=0,4771 + 0,4771 + 0,3010
=1,2552

b. log21
=log7 + log3
=0,8451 + 0,4771
=1.3222