Câu hỏi trắc nghiệm (10 câu):
-
- A. \( + \infty \)
- B. 4
- C. 2
- D. -1
-
- A. \(\frac{2}{5}\)
- B. \(\frac{1}{5}\)
- C. 0
- D. 1
-
- A. \(- \infty \)
- B. -4
- C. 3
- D. \(+ \infty \)
-
- A. \({u_n} = \frac{{{n^2} - 2n}}{{5n + 5{n^2}}}\)
- B. \({u_n} = \frac{{1 - 2n}}{{5n + 5}}\)
- C. \({u_n} = \frac{{1 - 2{n^2}}}{{5n + 5}}\)
- D. \({u_n} = \frac{{1 - 2n}}{{5n + 5{n^2}}}\)
-
- A. \({u_n} = 3{n^2} - {n^3}\)
- B. \({u_n} = {n^2} - 4{n^3}\)
- C. \({u_n} = 3{n^2} - n\)
- D. \({u_n} = 3{n^3} - {n^4}\)
-
- A. \({u_n} = {n^4} - 3{n^3}\)
- B. \({u_n} = 3{n^3} - {n^4}\)
- C. \({u_n} = 3{n^2} - n\)
- D. \({u_n} = - {n^2} + 4{n^3}\)
-
- A. \( + \infty \)
- B. \(\frac{2}{5}\)
- C. -7
- D. \( - \infty \)
-
- A. \(\frac{2}{3}\)
- B. \(\frac{1}{2}\)
- C. \(\frac{-2}{3}\)
- D. \(\frac{-1}{2}\)
-
- A. \(\sqrt 5 \)
- B. 8
- C. \(\frac{5}{2}\)
- D. \( + \infty \)
-
- A. \( - \infty \)
- B. 2
- C. 4
- D. \( + \infty \)
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