Tolong yg bisa jawab buat besok soalnya

2log 7 = a
7log5 = b
Maka :
2log 7 x 7log 5 = 2log5 (sifat logaritma)
a x b = 2log 5 ==> 2log 5 = ab

14log 35 = (2log 35)/(2log 14) (sifat logaritma)
= 2 log (7 x5) / 2log (2×7)
=(2log 7 + 2log 5 )/ (2log 2 + 2log 7)
=( a + ab) / (1 + a)