Question

Bantuin dong.. soal kls 10

Answer 1

²log 7 = 1 + ² log(A-3B)
²log 7- ²log(A-3B) =1
² log (7 / (A-3B) ) =1
2 = 7 / A-3B
2(A-3B) = 7
2A-6B =7   (i)

3A=18+4B
3A-4B =18    (ii)

(i) dan (ii) di eliminasi hasilnya
A = 8 dan B= 3/2