Limit at Infinity with a Trigonometric Function
What is the value of $$\displaystyle\lim_{x \to \infty} \frac{7x^3 + x^2\cos(x)}{2x^3 + 5x}$$?
A
$$\frac{5}{2}$$
B
$$\text{nonexistent}$$
C
$$\frac{7}{2}$$
D
$$\frac{7}{5}$$
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