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.
Testing the Device. Bellâs assistant, Thomas Watson, was in a nearby room in Bellâs workshop, waiting to see if Bellâs device would work. Bell spoke these famous words into his device: âMr. Watson, come here. Watson heard the words clearly and distinctly, and thus, the first working model of a telephone was born. Although there were other inventors working on similar designs, including one whose patent application was almost on the same day as Bell submitted his, Bellâs invention was the first actual working telephonic device.
Chatterbox Tony Wright today broke the world record for the longest phone call â and he was still talking. The Cornishman talked on his internet phone for 40 hours â and was still going strong. The previous record for the worldâs longest phone call stood at 39 hours, 18 minutes and 24 seconds. It was set on November 3, 2005 by Sandra Kobel and Stephen Hafner, from Switzerland. But shortly after 2am today, Mr Wright successfully broke the record while talking to Jenny Barnard, of north London.