hp daru (1/3)*1/2×+2 besar sama 1/81...

Eksponen

(1/3)^(1/2 x + 2) ≥ 1/81
(1/3)^(1/2 x + 2) ≥ (1/3)^4
1/2 x + 2 ≤ 4
1/2 x ≤ 4 - 2 ... kdua ruas kalikan 2
x ≤ 4

HP = {x| x ≤ 4 , x e R}