Math is around our life.

When you go to Mcdonald’s, you would find that the shape of the Mcdonald’s sign is an interesting function if we add a x and y axis on it. If we extend the two sides of it, we can clearly imagine that each side would arbitrarily close to one points. Therefore, if we draw a line pass through the point, we will get the two vertical asymptotes. It is obvious that this function has no horizontal asymptote. There are still other good examples, like the shape of a banana, a path, and etc..

Also, sequence is common in the real life. Heart beating is a typical instance. My heart beats approximately 1 time per 1 second. I could get a sequence when I use a clock to record my heart beating. In this case, I will get a infinity figure if I spend a sufficiently long time to record my heart beating. Therefore, this is a divergent sequence.

In addition, there are some common examples of series. In order to earn more money, people tend to save the money in the bank. There is an annual interest. RBC has the highest interest, which is 0.8% per a year. Pretending I want to save $10,000 to RBC for 3 years. My total amount of the money after 3 years equals 10,000(1+0.8%)^3. If we want to calculate how much money we can get after n years, we just need to rewrite it into 10,000(1+0.8%)^n. According to this case, we won’t lose money; therefore, this is a divergent series.

In conclusion, people are living in a world of Math. Math is everywhere around our life. If you observe your life carefully, you would find more interesting functions, sequences and series!