Intervallar usuli — 9-sinf Algebra test savollari

1.Intervallar usulida (x-2)(x+3)(x-5) < 0 tengsizlikni yeching.

• A)x < -3 yoki 2 < x < 5
• B)-3 < x < 2 yoki x > 5
• C)-3 < x < 5
• D)x < -3

2.$\left(x-1\right)\frac{x-4}{x+2}\ge 0$ tengsizlikning yechimini toping.

• A)-2 < x ≤ 1 yoki x ≥ 4
• B)x ≤ -2 yoki 1 ≤ x ≤ 4
• C)-2 < x < 1
• D)x ≥ 4

3.x² - 4x + 3 ≤ (x-3)² tengsizlikni intervallar usulida yeching (soddalashtirib).

• A)x ≤ 3
• B)x ≥ 3
• C)x ≤ -3
• D)hamma joyda

4.(2-x)(x+4) > 0 tengsizlikni intervallar usulida yeching.

• A)-4 < x < 2
• B)x < -4 yoki x > 2
• C)x > 2
• D)x < -4

5.x³ - 4x < 0 tengsizlikni intervallar usulida yeching (x(x-2)(x+2)<0 ko'rinishida).

• A)x < -2 yoki 0 < x < 2
• B)-2 < x < 0 yoki x > 2
• C)x < -2
• D)0 < x < 2

6.(x-1)(x-2)(x-3) > 0 tengsizlikning yechimini toping.

• A)1 < x < 2 yoki x > 3
• B)x < 1 yoki 2 < x < 3
• C)x > 3
• D)x < 1

7.x(x-5) ≤ 0 tengsizlikni intervallar usulida yeching.

• A)0 ≤ x ≤ 5
• B)x ≤ 0 yoki x ≥ 5
• C)x ≥ 5
• D)x ≤ 0

8.(x+1)(x-2) ≥ 0 tengsizlikni yeching.

• A)x ≤ -1 yoki x ≥ 2
• B)-1 ≤ x ≤ 2
• C)x ≥ 2
• D)x ≤ -1

9.(x-3)(x+3) < 0 tengsizlikning yechimini toping.

• A)-3 < x < 3
• B)x < -3 yoki x > 3
• C)x > 3
• D)x < 3

10.Intervallar usulida ishorani aniqlashda nechta ildiz bo'lsa, son o'qi nechta oraliqqa bo'linadi (n ta ildiz uchun)?

• A)n+1 ta oraliqqa
• B)n ta oraliqqa
• C)n-1 ta oraliqqa
• D)2n ta oraliqqa