Page 18 - CHƯƠNG II: GIẢI TÍCH 12-12a2

Trường THPT Châu Phú Chương II: Mũ – Lôgarit INOXHTT
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Câu 143: Hàm số y = 1 có tập xác định là:
−
1 ln x
A. (0; +∞)\ {e} B. (0; +∞) C. R D. (0; e)
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− x
 2 
−
Câu 144: Phương trình 0,125.4 2x 3 =     có nghiệm là:
 8 
A. 3 B. 4 C. 5 D. 6

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Câu 145: Cho log 6 a . Khi đó log318 tính theo a là:
2
−
A. 2a 1 B. a C. 2a + 3 D. 2 - 3a
+
−
a 1 a 1
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Câu 146: Nếu log x = 1 (log 9 3log 4) (a > 0, a ạ 1) thì x bằng:
a a a
2
A. 2 2 B. 2 C. 8 D. 16

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Câu 147: Cho log 5 a; log 5 b= = . Khi đó log 5 tính theo a và b là:
2 3 6
1 ab 2 2
A. B. C. a + b D. a + b
a + b a + b
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Câu 148: 3log log 16 ) log 2+ 1 bằng:
2
4
2
A. 2 B. 3 C. 4 D. 5

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