Kvadrat tengsizlik va uning yechimi — 9-sinf Algebra test savollari

1.x² - 5x + 6 > 0 tengsizlikni yeching.

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

2.x² - 4x + 4 ≤ 0 tengsizlikning yechimini toping.

• A)x = 2 (yagona yechim)
• B)yechimi yo'q
• C)x $\in$ (-∞; +∞)
• D)x < 2

3.-x² + 3x - 5 > 0 tengsizlikning yechimlar to'plamini aniqlang (diskriminant manfiy, a<0).

• A)yechimi yo'q
• B)barcha haqiqiy sonlar
• C)x < 0
• D)x > 0

4.x² + x + 1 < 0 tengsizlikni yeching.

• A)yechimi yo'q
• B)barcha haqiqiy sonlar
• C)-1 < x < 0
• D)x < -1

5.2x² - 7x + 3 ≥ 0 tengsizlikning yechimini toping.

• A)$x\le \frac{1}{2}$ yoki x ≥ 3
• B)$\frac{1}{2}\le x\le 3$
• C)$x\le -\frac{1}{2}$ yoki x ≥ -3
• D)x ≥ 3

6.x² - 9 < 0 tengsizlikni yeching.

• A)-3 < x < 3
• B)x < -3 yoki x > 3
• C)x < 3
• D)0 < x < 9

7.x² - 16 ≥ 0 tengsizlikning yechimini toping.

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

8.x² - 3x > 0 tengsizlikni yeching.

• A)x < 0 yoki x > 3
• B)0 < x < 3
• C)x > 3
• D)x < 3

9.x² + 4x ≤ 0 tengsizlikning yechimini toping.

• A)-4 ≤ x ≤ 0
• B)x ≤ -4 yoki x ≥ 0
• C)0 ≤ x ≤ 4
• D)x ≤ 0

10.x² < 25 tengsizlikni yeching.

• A)-5 < x < 5
• B)x < 5
• C)x < -5 yoki x > 5
• D)0 < x < 5