Limit of a sequence

1003047604

Level: 
C
Choose the correct computation of the limit. \[ L=\lim\limits_{n\to\infty} \left( \sqrt{n^2+3n}-2n \right) \]
\( L=\lim\limits_{n\to\infty}n\left( \sqrt{1+\frac3n}-2 \right) = -\infty \)
\( L= \infty-\infty=0 \)
\( L=\lim\limits_{n\to\infty}⁡(n-2n)=-\infty \)
\( L=\lim\limits_{n\to\infty} \left( n^2+3n-4n^2 \right) =-3 \)
\( L=\lim\limits_{n\to\infty}⁡\frac{n^2+3n-4n^2}{\sqrt{n^2+3n}+2n}=\infty \)

1003047602

Level: 
C
Choose the step to take first to efficiently evaluate the limit of the sequence \( \left(n-\sqrt{n^2-1} \right)_{n=1}^{\infty} \).
We expand with the expression \( n+\sqrt{n^2-1} \).
We expand with the expression \( n-\sqrt{n^2-1} \).
We expand with \( n \).
We multiply by the expression \( n+\sqrt{n^2-1} \).
We multiply by the expression \( n-\sqrt{n^2-1} \).
We substitute \( n=\infty \).

1003035910

Level: 
B
Find the limit of the sequence \( \left( \left( -\frac23 \right)^n \right)_{n=1}^{\infty} \).
\( \lim\limits_{n\rightarrow\infty}\left( -\frac23 \right)^n=0 \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac23 \right)^n=-\infty \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac23 \right)^n=-\frac23 \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac23 \right)^n=-\frac32 \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac23 \right)^n \) does not exist.

1003035909

Level: 
B
Find the limit of the sequence \( \left(\left( -\frac32 \right)^n \right)_{n=1}^{\infty} \).
\( \lim\limits_{n\rightarrow\infty}\left( -\frac32 \right)^n \) does not exist.
\( \lim\limits_{n\rightarrow\infty}\left( -\frac32 \right)^n = \infty \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac32 \right)^n = 0 \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac32 \right)^n = -\infty \)
\( \lim\limits_{n\rightarrow\infty}\left( -\frac32 \right)^n = -\frac32\)

1003035908

Level: 
B
Find the limit of the sequence \( \left(\left( \frac23 \right)^n\right)_{n=1}^{\infty} \).
\( \lim\limits_{n\rightarrow\infty}\left( \frac23 \right)^n =0 \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac23 \right)^n =-\infty \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac23 \right)^n =\frac{16}{81} \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac23 \right)^n =\frac23 \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac23 \right)^n \) does not exist.

1003035907

Level: 
B
Find the limit of the sequence \( \left(\left( \frac32 \right)^n \right)_{n=1}^{\infty} \).
\( \lim\limits_{n\rightarrow\infty}\left( \frac32 \right)^n =\infty \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac32 \right)^n =\frac32 \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac32 \right)^n =\frac{81}{16} \)
\( \lim\limits_{n\rightarrow\infty}\left( \frac32 \right)^n = 0\)
\( \lim\limits_{n\rightarrow\infty}\left( \frac32 \right)^n \) does not exist.