Ada yg bisa bantu? Thanks

4 (1/2)logt < (1/2)log81
(1/2)logt^4 < (1/2)log81
t^4 > 81
t^4 - 81 > 0
(t^2 - 9)(t^2 + 9) > 0
(t + 3)(t - 3)(t^2 + 9) > 0
t = -3 atau t = 3
Garis bilangan
+++ (-3) --- (3) ++++
t < -3 atau t > 3

Syarat : (1/2)logt => t > 0

Jadi berdasarkan syarat HP yang memenuhi : t > 3

Bab Logaritma
Matematika SMA Kelas X

4 (^(1/2)log t) < ^(1/2)log 81
^(1/2)log t⁴ < ^(1/2)log 81
t⁴ > 81
t⁴ - 81 > 0
(t + 3) (t - 3) (t² + 9) > 0

t < -3 atau t > 3

syarat, t > 0

maka, t > 3

jawabannya B