Giá trị của giới hạn $\mathop {\lim }\limits_{x \to 2} \sqrt[3]{{\dfrac{{{x^2} - x - 1}}{{{x^2} + 2x}}}}$ là:

\( - \infty \)

\(\dfrac{5}{2}\).

\( + \infty \)

$2$

7

3

\( - 7\)

\( - 3\)

3

\( - \infty \)

2

\( + \infty .\)

1

\( - \infty \).

0

\( + \infty \).

\(\mathop {\lim }\limits_{x \to {x_0}} x = {x_0}\)  

\(\mathop {\lim }\limits_{x \to {x_0}} x = 1\)

\(\mathop {\lim }\limits_{x \to {x_0}} c = {x_0}\)

\(\mathop {\lim }\limits_{x \to {x_0}} x = 0\)

\(\mathop {\lim }\limits_{x \to {x_0}} \dfrac{{f\left( x \right)}}{{g\left( x \right)}} = \dfrac{L}{M}\)

\(\mathop {\lim }\limits_{x \to {x_0}} \left[ {f\left( x \right).g\left( x \right)} \right] = L.M\)

\(\mathop {\lim }\limits_{x \to {x_0}} \left[ {f\left( x \right) - g\left( x \right)} \right] = L - M\)    

\(\mathop {\lim }\limits_{x \to {x_0}} \left[ {f\left( x \right) + g\left( x \right)} \right] = L + M\)