\(\mathop {\lim }\limits_{x \to  + \infty } \left(...

Câu hỏi: \(\mathop {\lim }\limits_{x \to  + \infty } \left( {\sqrt {{x^2} + x - 1}  + x} \right)\) bằng

A. \( - \infty \)

B. \( - \frac{1}{2}\)

C. \( + \infty \)

D. \(  \frac{1}{2}\)