Jawabanmu

2014-06-16T22:10:20+07:00
2logx ≤ log(3+x) + log 4
log x² ≤ log(12 - 4x)
x² ≤ 12 - 4x
x² + 4x - 12 ≤ 0
(x + 6)(x - 2) ≤ 0
++++++  ---------    +++++++
----------o----------o-------------    catatan bundarannya hitam
           - 6            2
Numerus 12 - 4x > 0 ⇔ 4x < 12 ⇔ x < 3
HP { x I 2 ≤ x < 3 , dengan x ∈ R}