Limits at infinity and algebraic tricks

Question 1

How should you solve a limit at infinity

Answer 1

Only use the numbers with the highest power/s

Question 2

If a limit at infinity is a number times a variable your answer would be

Answer 2

-infinity or infinity

Question 3

If a limit with an infinity is a number divided by a variable your answer would be

Answer 3

zero

Question 4

If a limit with an infinity is two numbers divided by the same power your answer would be

Answer 4

the number with the variables canceled out
Ex: 3/2