Question

9. jika 3 log 5=p dan 5 log4= q maka 4 log 15=

10.jika 2 log 7=a maka 8 log 49=
ada yg tau gx plies ya bsrta caranya

Answer 1

9. ³ log 5→log 5 ÷ log 3 = p→ log 3 = log 5 ÷ p
5 log 4→ log 4 ÷ log 5 = q→ log 4 = q log 5
4 log 15→ log 15 ÷ log 4 = log (3x5) ÷ log 4 = (log 3 + log 5) ÷ log 4
((log 5 ÷ p) + log 5) ÷ q log 5 = 1/p + 1 ÷ q = p + q ÷ pq

10. ² log 7 = a
8 log 49 = 2^3 log 7^2 = 2/3 ² log 7 = 2/3a