Nurli kelajak

← Olimpiada sahifasiga qaytish

Javoblari bilan test
  1. Tenglamani yeching: \( \log_2(x^2 - 4x + 5) = 1 \).
    • A. x = 1, x = 3 ✓
    • B. x = 2, x = 3
    • C. x = 1, x = 4
    • D. x = 2, x = 4
  2. Ifodani soddalashtiring: \( \frac{x^3 - 27}{x^2 - 9} \).
    • A. x + 3
    • B. x - 3
    • C. \( \frac{x^2 + 3x + 9}{x + 3} \) ✓
    • D. \( \frac{x^2 - 3x + 9}{x - 3} \)
  3. Tengsizlikni yeching: \( |2x - 5| < 3 \).
    • A. 1 < x < 4 ✓
    • B. x < 1 yoki x > 4
    • C. x < 4
    • D. x > 1
  4. Funksiya aniqlanish sohasini toping: \( f(x) = \sqrt{9 - x^2} \).
    • A. [-3, 3] ✓
    • B. (-3, 3)
    • C. (-∞, -3] ∪ [3, ∞)
    • D. (-∞, -3) ∪ (3, ∞)
  5. Tenglamani yeching: \( 3^{2x} - 4 \cdot 3^x + 3 = 0 \).
    • A. x = 0, x = 1 ✓
    • B. x = 1, x = 2
    • C. x = 0, x = 2
    • D. x = -1, x = 1
  6. Arifmetik progressiyada a₁ = 5, d = 3 boʻlsa, a₁₀ ni toping.
    • A. 32 ✓
    • B. 35
    • C. 38
    • D. 41
  7. Geometrik progressiyada b₁ = 2, q = 3 boʻlsa, b₅ ni toping.
    • A. 162 ✓
    • B. 54
    • C. 18
    • D. 6
  8. Tenglamani yeching: \( \sin x = \frac{1}{2} \), \( 0 \leq x \leq 2\pi \).
    • A. x = \frac{\pi}{6}, x = \frac{5\pi}{6} ✓
    • B. x = \frac{\pi}{3}, x = \frac{2\pi}{3}
    • C. x = \frac{\pi}{4}, x = \frac{3\pi}{4}
    • D. x = \frac{\pi}{2}, x = \frac{3\pi}{2}
  9. Ifodani hisoblang: \( \lim_{x \to 2} \frac{x^2 - 4}{x - 2} \).
    • A. 0
    • B. 2
    • C. 4 ✓
    • D. Mavjud emas
  10. Funksiyaning hosilasini toping: \( f(x) = x^3 - 3x^2 + 2 \).
    • A. 3x^2 - 6x ✓
    • B. 3x^2 - 6x + 2
    • C. x^2 - 3x
    • D. 3x^2 - 3
  11. Tenglamani yeching: \( \sqrt{x + 3} = x - 3 \).
    • A. x = 6 ✓
    • B. x = 1, x = 6
    • C. x = 1
    • D. Yechim yoʻq
  12. Ifodani soddalashtiring: \( \frac{2^{n+3} - 2^{n+1}}{2^n} \).
    • A. 2
    • B. 4
    • C. 6 ✓
    • D. 8
  13. Tengsizlikni yeching: \( x^2 - 5x + 6 > 0 \).
    • A. x < 2 yoki x > 3 ✓
    • B. 2 < x < 3
    • C. x < 3
    • D. x > 2
  14. Funksiyaning eng kichik qiymatini toping: \( f(x) = x^2 - 4x + 5 \).
    • A. 1 ✓
    • B. 2
    • C. 3
    • D. 4
  15. Tenglamani yeching: \( \log_3(x - 1) + \log_3(x + 1) = 1 \).
    • A. x = 2 ✓
    • B. x = -2, x = 2
    • C. x = 4
    • D. x = -4, x = 4
  16. Ifodani hisoblang: \( \int_0^1 (2x + 3) \, dx \).
    • A. 3
    • B. 4 ✓
    • C. 5
    • D. 6
  17. Tenglamani yeching: \( 2\cos^2 x - \cos x - 1 = 0 \), \( 0 \leq x \leq 2\pi \).
    • A. x = 0, x = \frac{2\pi}{3}, x = \frac{4\pi}{3}
    • B. x = \frac{\pi}{3}, x = \pi, x = \frac{5\pi}{3} ✓
    • C. x = \frac{\pi}{2}, x = \frac{3\pi}{2}
    • D. x = \frac{\pi}{6}, x = \frac{5\pi}{6}
  18. Arifmetik progressiyaning birinchi 10 ta hadi yigʻindisi 120, birinchi hadi 3 boʻlsa, ayirmasini toping.
    • A. 2 ✓
    • B. 3
    • C. 4
    • D. 5
  19. Tenglamani yeching: \( \frac{x}{x-2} + \frac{3}{x+2} = \frac{8}{x^2 - 4} \).
    • A. x = 1 ✓
    • B. x = 2
    • C. x = 3
    • D. Yechim yoʻq
  20. Ifodani soddalashtiring: \( \frac{\sqrt{50} - \sqrt{18}}{\sqrt{2}} \).
    • A. 2 ✓
    • B. \sqrt{2}
    • C. 4
    • D. 2\sqrt{2}
  21. Tengsizlikni yeching: \( \frac{x-1}{x+2} \leq 0 \).
    • A. -2 < x \leq 1 ✓
    • B. x \leq -2 yoki x \geq 1
    • C. x < -2 yoki x > 1
    • D. x \leq 1
  22. Funksiyaning oʻsish oraligʻini toping: \( f(x) = x^3 - 6x^2 + 9x + 1 \).
    • A. (-∞, 1) ∪ (3, ∞) ✓
    • B. (1, 3)
    • C. (-∞, 3)
    • D. (1, ∞)
  23. Tenglamani yeching: \( 4^{x-1} = 8^{x+2} \).
    • A. x = -8 ✓
    • B. x = -4
    • C. x = 4
    • D. x = 8
  24. Ifodani hisoblang: \( \log_5 125 + \log_2 16 - \log_3 9 \).
    • A. 5
    • B. 6 ✓
    • C. 7
    • D. 8
  25. Tenglamani yeching: \( \sqrt{2x + 5} - \sqrt{x - 1} = 2 \).
    • A. x = 5 ✓
    • B. x = 10
    • C. x = 2, x = 5
    • D. Yechim yoʻq
  26. Geometrik progressiyaning birinchi 5 ta hadi yigʻindisi 62, maxraji 2 boʻlsa, birinchi hadini toping.
    • A. 2 ✓
    • B. 4
    • C. 6
    • D. 8
  27. Tenglamani yeching: \( \tan x = \sqrt{3} \), \( 0 \leq x \leq 2\pi \).
    • A. x = \frac{\pi}{3}, x = \frac{4\pi}{3} ✓
    • B. x = \frac{\pi}{6}, x = \frac{7\pi}{6}
    • C. x = \frac{\pi}{4}, x = \frac{5\pi}{4}
    • D. x = \frac{\pi}{2}, x = \frac{3\pi}{2}
  28. Ifodani hisoblang: \( \lim_{x \to \infty} \frac{3x^2 + 2x - 1}{x^2 - 4} \).
    • A. 0
    • B. 1
    • C. 3 ✓
    • D. ∞
  29. Funksiyaning ikkinchi tartibli hosilasini toping: \( f(x) = \sin x + \cos x \).
    • A. -\sin x - \cos x ✓
    • B. \sin x - \cos x
    • C. -\sin x + \cos x
    • D. \sin x + \cos x
  30. Tengsizlikni yeching: \( \log_{\frac{1}{2}}(x - 1) > 2 \).
    • A. 1 < x < \frac{5}{4} ✓
    • B. x > \frac{5}{4}
    • C. x < \frac{5}{4}
    • D. x > 1