Evaluate the following limits. If needed, enter oo for $\displaystyle \infty$ and oo for $\displaystyle -\infty$.

(a)$\displaystyle \lim_{{{x}\rightarrow\infty}}{\frac{{\sqrt{{{6}+{5}{x}^{{2}}}}}}{{{6}+{7}{x}}}}=$
Preview Question 6 Part 1 of 2  

(b)$\displaystyle \lim_{{{x}\rightarrow-\infty}}{\frac{{\sqrt{{{6}+{5}{x}^{{2}}}}}}{{{6}+{7}{x}}}}=$
Preview Question 6 Part 2 of 2