Compute the limit for $x \to \infty$ of a certain rational function Compute the following limit:
$$
\lim_{x \to \infty}
\frac{9x^8 + 5x^2 − 6}{
3x^8 + 2x^4 + 1}
$$
The answer may be 
A. 2
B. 3
C. 5
D. 7

Hint: Divide numerator and denominator by $x^8$ to get:
$$\lim_{x \to \infty}\frac{9+5/x^{6}-6/x^8}{3+2/x^4+1/x^8}$$
