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2. tengsizlikni yeching.
A) (–∞; –1) B) (1; ∞) C)
D) E) [– 1;1]
3. tengsizlikning eng kichik butun yechimi 10 dan qancha kam?
A) 11 ta B) 8 ta C) 7 ta D) 9 ta E) 6 ta
4. tengsizlikni yeching.
A) (–∞; –4] B) [–4; ∞) C) [–4; 4] D)
E) (–∞; 6]
5. tengsizlikning eng katta butun yechimini toping.
A) 2 B) –2 C) 1 D) 4 E) 0
6. tengsizlikni yeching.
A) (– ∞; – 5) B) (5; ∞) C) (– ∞; – 5) U (5; ∞) D) (– 5; 5) E) (– ∞; ∞)
7. Nechta natural son tengsizlikni qanoatlantiradi?
A) 7 B) 8 C) 9 D) 10 E) 12
8. tengsizlikni yeching.
A) (2; 1) B) (∞; 2] C) [1; ∞)
D) (2; 0) E) (0; 1)
9. x² · 5^x 5^2+x ≤ 0 tengsizlikning tub sonlardan iborat yechimlari nechta?
A) 0 B) 1 C) 2 D) 3 E) 4
10. tengsizlikning butun yechimlari yig‘indisini toping. A) 1 B) 3 C) 4 D) 0 E) 5

Nazariy qism
20. Logarifmik ifodalar
20.1 Logarifmik ifodalarni shakl almashtirish


Logarifm nima?


Tarif: a asosga ko’ra, b sonning logarifmi deyiladi , b sonni hosil qilish uchun a sonni ko’tarish kerak bo’ladigan daraja tushuniladi va ko’rinishda bo’ladi. Bunda - asos , - daraja
Masalan: bu nima degani , 6 ning nechanchi darajasi 36 bo’ladi ,


Logarifmning asosiy formulalari
a > 0, a ≠ 1, b > 0, b ≠ 1 uchun quyidagi formulalar o`rinli

1.
2.
3.
4.