Cho \(\mathop {\lim }\limits_{x \to 1} \frac{{f(x) - 10}} = 5\). Giá trị \(\mathop {\lim }\limits_{x \to 1} \frac{{f(x) - 10}}{{\left( {\sqrt x - 1} \right)\left[ {\sqrt {4f(x) + 9} + 3} \right]}}\) bằng bao nhiêu?