Chọn khẳng định đúng.

$6,{79.10^{ - 5}}T$

$4,{4.10^{ - 5}}T$

$7,{6.10^{ - 5}}T$

$5,{78.10^{ - 5}}T$

$\lim {u_n} = 0$       

$\mathop {\lim }\limits_{n \to  + \infty } {u_n} = 0$

$\mathop {\lim }\limits_{n \to 0} {u_n} = 0$          

$\lim \left( {{u_n}} \right) = 0$

$\lim \dfrac{{{u_n} + 1}}{{3u_n^2 + 5}} = 1$ .

$\lim \dfrac{{{u_n} + 1}}{{3u_n^2 + 5}} = 0$ .

$\lim \dfrac{{{u_n} + 1}}{{3u_n^2 + 5}} = \dfrac{1}{3}$ .

$\lim \dfrac{{{u_n} + 1}}{{3u_n^2 + 5}} =  + \infty$

$\dfrac{1}{3}$

$\dfrac{258}{3}$

$\dfrac{256}{33}$

$\dfrac{794}{99}$

$\lim {u_n} = 0$

$\lim {v_n} = 0$       

$\lim {u_n} - \lim {v_n} = 0$           

Không tồn tại $\lim {v_n}$

$\lim \dfrac{1}{{{2^n}}} = 0$

$\lim \dfrac{1}{{{3^n}}} = 0$        

$\lim \dfrac{1}{{0,{5^n}}} = 0$     

$\lim \dfrac{1}{{{{\left( {\sqrt 2 } \right)}^n}}} = 0$