jika 5 log 3 = p, nyatakan dalam p a. 5 log 45 b. 15 log 81

a) 5'log 45 = 5'log (3² x 5)
= 2 5'log 3 + 5'log 5
= 2p + 1

b) 15'log 81 = 5'log 3^4 / 5'log (3 x 5)
= 4p / (p + 1)