jika 3log 5 = p. nilai 25 log 81 =

²log81 = 5² log 3⁴
=4/2 .5log3
=2 1/p
= 2/p

semoga membantu ,

25 log 81
= 3 log 81/3 log 25
= 3 log 3⁴ / 3 log 5²
= 4 × 3 log 3 / 2× 3 log 5
= 4 × 1 / 2 × p
= 4/2p = 2/p