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Verified answer
Kelas 10 MatematikaBab Akar dan Pangkat
√((2x + 4)/(1 - x)) ≥ √(x + 1)
√((2x + 4)/(1 - x))² ≥ √(x + 1)²
(2x + 4)/(1 - x) ≥ x + 1
(2x + 4)/(1 - x) - (x + 1) ≥ 0
(2x + 4 - (x + 1) (1 - x))/(1 - x) ≥ 0
(2x + 4 - (x - x² + 1 - x))/(1 - x) ≥ 0
(2x + 4 + x² - 1)/(1 - x) ≥ 0
(x² + 2x + 3)/(1 - x) ≥ 0
(x² + 2x + 3) . (1 - x) ≥ 0
x² + 2x + 3 → imajiner, karena b² - 4ac < 0
1 - x ≥ 0
-x ≥ -1
x ≤ 1
syarat
x + 1 ≥ 0
x ≥ -1
-1 ≤ x
(2x + 4) (1 - x) > 0
(2x + 4) (x - 1) < 0
x - 1 < 0
x < 1
2x + 4 > 0
2x > -4
x > -2
-2 < x < 1
HP = { x | - 1 ≤ x < 1, x ∈ bilangan real }