Câu hỏi trắc nghiệm (10 câu):
-
- A. \( - \frac{2}{3}\)
- B. \(\frac{2}{3}\)
- C. \(\frac{3}{2}\)
- D. 2
-
- A. \({u_n} = \frac{{{n^2} - 2n}}{{5n + 5{n^2}}}\)
- B. \({u_n} = \frac{{1 + 2n}}{{5n + 5}}\)
- C. \({u_n} = \frac{{1 + {n^2}}}{{5n + 5}}\)
- D. \({u_n} = \frac{{{n^2} - 2}}{{5n + 5{n^3}}}\)
-
- A. \({u_n} = \frac{{9{n^2} + 7n}}{{n + {n^2}}}\)
- B. \({u_n} = \frac{{2007 + 2008n}}{{n + 1}}\)
- C. \({u_n} = 2008n - 2007{n^2}\)
- D. \({u_n} = {n^2} + 1\)
-
- A. \(\lim \frac{{2{n^2} - 3}}{{ - 2{n^3} - 4}}\)
- B. \(\lim \frac{{2{n^2} - 3}}{{ - 2{n^2} - 1}}\)
- C. \(\lim \frac{{2{n^2} - 3}}{{ - 2{n^3} + 2{n^2}}}\)
- D. \(\lim \frac{{2{n^3} - 3}}{{ - 2{n^2} - 1}}\)
-
- A. \(\lim \frac{{2{n^2} - 3}}{{ - 2{n^3} - 4}}\)
- B. \(\lim \frac{{2n - 3{n^3}}}{{ - 2{n^2} - 1}}\)
- C. \(\lim \frac{{2{n^2} - 3{n^4}}}{{ - 2{n^3} + 2{n^2}}}\)
- D. \(\lim \frac{{3 + 2{n^3}}}{{2{n^2} - 1}}\)
-
- A. \(\lim \frac{{2{n^2} + 3}}{{{n^3} + 4}}\)
- B. \(\lim \frac{{2n - 3{n^3}}}{{2{n^2} - 1}}\)
- C. \(\lim \frac{{2{n^2} - 3{n^4}}}{{ - 2{n^3} + 2{n^2}}}\)
- D. \(\lim \frac{{3 - 2{n^3}}}{{2{n^2} - 1}}\)
-
- A. -2
- B. -1
- C. 0
- D. 3
-
Câu 8:
\(\mathop {\lim }\limits_{x \to - 1} \left( {{x^2} - 2x + 3} \right)\) có giá trị là bao nhiêu?
- A. 0
- B. 2
- C. 4
- D. 6
-
Câu 9:
\(\mathop {\lim }\limits_{x \to 2} \left( {{x^2} - 3x - 5} \right)\) có giá trị là bao nhiêu?
- A. -15
- B. -7
- C. 3
- D. \( + \infty \)
-
- A. 0
- B. \(\frac{4}{9}\)
- C. \(\frac{3}{5}\)
- D. \( + \infty \)
