Question

³log 1 / 9 - ³log 1 / 27 adalah...
A.-5
B.-4
C.-1
D.1
E.2

Pake cara ya...
Mohon bantuannya ^-^

Answer 1

Verified answer

3^Log1/9-3^Log1/27 = 3^Log3^-2 - 3Log3^-3
= -2 x 3^Log3 - (-3)3^Log3
= -2 - (-3)
= -2 + 3
= 1

jawabannya D. 1

Answer 2

=³log(1/9)  - ³log(1/27)

=³log(1/(3^2)) - ³log(1/(3^3))    (9 = 3^2)

=³log(3^-2) - ³log(3^-3)    (ingat jika ada 1/a = a^-1)

=-2.³log3 - (-3) ³log3        (ingat jika ada alogb^n = n . alogb)

=-2 . 1 + 3 .1                    (ingat jika ada aloga= 1)

=-2 + 3

=1

Jadi Jawabannya : D