A. lim $\frac{1-n}{2n+1}$

B. lim ${\left(\frac{3}{2}\right)}^n$

C. lim ${\left(\frac{\mathrm{\pi }}{4}\right)}^n$

D. lim $n^2$

A.  $\underset{n\to +\infty }{lim}\frac{3n^2-1}{n}$

B. $\underset{n\to +\infty }{lim}\frac{3n^2-n^4}{n^2+3}$

C. $\underset{n\to +\infty }{lim}\frac{n^2-3n^3}{n-n^3}$

D. $\underset{n\to +\infty }{lim}\frac{2n^2-2n^3}{n^3-5n}$

A.  $lim\frac{2n^2+3}{-2n^3+4}$

B. $lim\frac{2n-3n^2}{-2n^2-1}$

C. $lim\frac{2n^2-3}{-2n^3+2n^2}$

D. $lim\frac{2n^2-3}{-2n^2-1}$

A.  $lim\frac{3n^2-5}{-3n^3-4}$

B. $lim\frac{2n^2-3}{-2n^2+7}$

C. $lim\frac{4n^2-3}{-4n^2+3n^2}$

D. $lim\frac{2n^3-3}{-2n^2-1}$

A.  $lim\frac{2n^3+3}{1-2n^2}$

B. $lim(n^3-4n^2+1)$

C.  $lim\frac{3^{n+1}+2n}{5+3^n}$

D.  $lim\frac{3n^2+n}{4n^2-5}$

A.  $\underset{x\to 0}{\lim }\frac{1}{x}$ 

B.  $\underset{x\to 1^{+}}{\lim }\frac{1}{-x+1}$ 

C.  $\underset{x\to -\infty }{\lim }\left(\sqrt{x^2+x}-x\right)$ 

D.  $\underset{x\to +\infty }{\lim }\frac{x^2+x+1}{-x+1}$ 

A.  $lim\frac{3^{n+1}+2n}{3^n+5}$

B. $lim\frac{3n^2+n}{4n^2-5}$

C. $lim\frac{2n^3+3}{2n^2+1}$

D. $lim\left(\sqrt{n^2+2n}-\sqrt{n^2-1}\right)$

A. $\lim \left(1+\frac{n^3\cos 3n}{n^4+1}\right)$

B. $\lim \frac{3^n-\sin 5n}{3^n}$

C. $\lim \frac{n^3+{\sin }^{2}n}{n^3+5}$

D. $\lim \frac{5^n+\cos 2n}{5^{n+1}}$

A.  $lim\left(1+\frac{n^3\cos 3n}{n^4+1}\right)$

B.  $lim\frac{3^n -\sin 5n}{3^n}$

C.  $lim\frac{n^3+{\sin }^{2}n}{n^3+5}$

D.  $lim\frac{5^n+\cos 2n}{5^{n+1}}$