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10-28.

Evaluate each of the following limits.

1. $\lim \limits _ { x \rightarrow \infty } \frac { 3 x ^ { 2 } - 5 x + 2 } { 7 - 5 x ^ { 2 } }$

Identify the dominant terms.

1. $\lim \limits _ { x \rightarrow 1 } \frac { 4 x ^ { 2 } - 4 } { x ^ { 3 } - x }$

Substitute in $x = 1$. What happens?

Factor and simplify. Then try substituting in $x = 1$.