Hi I need help with this practice question from my calculus prep guide

Explanation:
Limit of the function:
Limit is the approximate value of the function at a defined value of x.
[tex]\begin{gathered} \lim _{x\to a}f(x)=L \\ As\text{ }x\rightarrow a\text{ then, f(x)}\rightarrow L \end{gathered}[/tex]a)
[tex]\lim _{x\to-\infty}(2x^3-2x)=-\infty[/tex]This limit is true. As x approaches negative infinity the function is also approached to negative infinity.
b)
[tex]\lim _{x\to\infty}(-2x^4+6x^3-2x)=-\infty[/tex]As x tends to infinity. The functions tend to have negative infinity.
This statement is true.
c)
[tex]\lim _{x\to\infty}(9x^5-6x^3-x)=-\infty[/tex]When x tends to infinity, the function will also go to infinity.
So, This statement is false.