Question

Bantu jawab dengan cara

Answer 1

Verified answer

Bab Pertidaksamaan
Matematika SMP Kelas VIII

7] (x - 3)/(x - 2) < (x - 1) / (x - 4)
(x - 3)/(x - 2) - (x - 1)/(x - 4) < 0
((x - 3) (x - 4) - (x - 1) (x - 2)) / ((x - 2) (x - 4)) < 0
(x² - 7x + 12 - x² + 3x - 2) / ((x - 2) (x - 4)) < 0
(-4x + 10) / ((x - 2) (x - 4)) < 0
-2(2x - 5) / ((x - 2) (x - 4)) < 0

2x - 5 = 0
x = 5/2
x = 2 1/2

x - 2 = 0
x = 2

x - 4 = 0
x = 4

2 1/2 < x < 4

jawabannya C

8] x + (2/x) > 3
**semua dikalikan x**
x² + 2 > 3x
x² - 3x + 2 > 0
(x - 1) (x - 2)
x < 1 atau x > 2