tolong dong besok udah kumpul soalnya

3. x+1/x+2<3
x+1<3 (x+2)
x+1<3x +6
3x-x<6-1
2x. <5
x. <5/2
2.-4/2x+6>0
-4. >0(2x+6)
-4>0

2) -4/(2x + 6) ≥ 0
-2/(x + 3) ≥ 0
(x + 3) < 0
x < -3

3) (x + 1)/(x + 2) ≤ 3
(x + 1)/(x + 2) - 3 ≤ 0
(x + 1 - 3(x + 2))/(x + 2) ≤ 0
(x + 1 - 3x - 6)/(x + 2) ≤ 0
(-2x - 5)/(x + 2) ≤ 0
x = -5/2 atau x = -2
--- (-5/2) +++ (-2) ---
x ≤ -5/2 atau x > -2

4) (x + 1)/(x^2 - x - 6) > 0
(x + 1)/(x - 3)(x + 2) > 0
x = -1 atau x = 3 atau x = -2
--- (-2) +++ (-1) --- (3) ++++
-2 < x < -1 atau x > 3

5) 7/(x + 5) ≤ 5/(x - 7)
7/(x + 5) - 5/(x - 7) ≤ 0
(7(x - 7) - 5(x + 5))/(x + 5)(x - 7) ≤ 0
(7x - 49 - 5x - 25)/(x + 5)(x - 7) ≤ 0
(2x - 74)/(x + 5)(x - 7) ≤ 0
2(x - 37)/(x + 5)(x - 7) ≤ 0
x = 37 atau x = -5 atau x = 7
---- (-5) +++ (7) --- (37) +++
x < -5 atau 7 < x ≤ 37