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misal 4pangkat x = p
maka
p + 64/p > 20
dikalikan p
p² -20p + 64 > 0
(p -16) (p- 4)
p = 16 v p = 4
p = 16
4pangkat x = 16
4pangkat x = 4²
x = 2
p = 4
4pangkat x = 4
4pangkat x = 4¹
x = 1
dibuat garis bilangan ..
coba masukan nol
maka range hasil nya karena lebih dari nol
Hp = { x | x < 1 dan x > 2, x € R }