7. Jika a>0 dan a≠1, maka ^alog3-^alog27²+^alog243= A.0 B.^alog3 C.^alog3² D.^alog3³ E.^alog3⁴ Tolong dibantu secepatnya ya..

^a log 3 - ^a log 27² + ^a log 243
= ^a log 3 - ^a log 3^6 + ^a log 3^5
= ^a log (3/3^6 x 3^5)
= ^a log 3^(1 - 6 + 5)
= ^a log 3^0
= ^a log 1
= 0

Jawaban : A