A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees.
In the previous section we saw limits that were infinity and itâs now time to take a look at limits at infinity. By limits at infinity we mean one of the following two limits. In other words, we are going to be looking at what happens to a function if we let x get very large in either the positive or negative sense.
Our concept of limit allows us to talk about these things precisely. For example, let's consider the following limit: This is read the limit as x approaches infinity of one over x. Here you can't simply plug infinity and see what you get, because â is not a number. However, we can guess what this limit will be using our intuitive understanding. Take your calculator and try to divide 1 by a very big number.