Câu hỏi trắc nghiệm (10 câu):
-
- A. \(D=\left( 0;+\infty\right)\).
- B. \(D=\left( \frac{3}{2};+\infty \right)\).
- C. \(D=\left( -\infty ;0 \right)\).
- D. \(D=\left( -\infty ;\frac{3}{2} \right)\).
-
- A. \(\left[ 1;+\infty\right)\).
- B. \(\left( 1;+\infty \right)\).
- C. \(\left( -\infty ;+\infty \right)\).
- D. \(\left( -\infty ;1 \right)\cup \left( 1;+\infty \right)\).
-
- A. \(\mathbb{R}\backslash \left\{ 1 \right\}.\)
- B. \(\left( 1\,;\,+\infty \right).\)
- C. \(\left[ 1\,;\,+\infty \right).\)
- D. \(\mathbb{R}.\)
-
- A. \(\left( -\infty ;-1 \right)\cup \left( 1;+\infty \right)\).
- B. \(\left( 1;+\infty \right)\).
- C. \(\mathbb{R}\backslash \left\{ \pm 1 \right\}\).
- D. \(\left( -\infty ;-1 \right)\).
-
- A. \(y={{3}^{x}}\).
- B. \(y={{\left( \sqrt{3} \right)}^{x}}\).
- C. \(y={{\left( -\frac{1}{3} \right)}^{x}}\).
- D. \(y={{\left( \frac{1}{3} \right)}^{x}}\).
-
- A. \(\left[ -2;+\infty \right)\).
- B. \(\left( -\infty ;-2 \right)\).
- C. \(\left( -\infty ;-2 \right]\).
- D. \(\left( 0;+\infty \right)\).
-
- A. \(\left( -\infty \,;\,+\infty \right)\).
- B. \(\left( -\infty \,;\,0 \right)\cap \left( 0\,;\,+\infty \right)\).
- C. \(\left( -\infty \,;\,0 \right)\cup \left( 0\,;\,+\infty \right)\).
- D. \(\left( 0\,;\,+\infty \right)\).
-
Câu 8:
Tập xác định của hàm số \(y=\log x+\log \left( 3-x \right)\) là
- A. \(\left( 3\,;+\infty \right)\).
- B. \(\left[ 0\,;3 \right]\).
- C. \(\left[ 3\,;+\infty \right)\).
- D. \(\left( 0\,;3 \right)\).
-
- A. \(D=\mathbb{R}\).
- B. \(D=\left( 3;+\infty \right)\).
- C. \(D=\mathbb{R}\backslash \left\{ 3 \right\}\).
- D. \(D=\left[ 3;+\infty \right)\).
-
- A. \(\left( -\infty ;2 \right)\).
- B. \(\left( 2;+\infty \right)\).
- C. \(\left( -\infty ;+\infty \right)\).
- D. \(\left( 0;+\infty \right)\).
.PNG)
