1. For a function: When I toss a coin up, the trend of the coin will be a parabola function. To assume the x-axis is time, and y-axis is the distance to the ground. The function opens down. The graph of the function does not have a horizontal asymptote.
2. For a sequence: I like eating apples. If I have enough time, I will eat apples as my breakfast. I can recall the number of apples I ate every morning in last week. The sequence of the numbers is 2, 0, 1, 0, 1, 1, 0. Also, I do not make a plan of how many apples I will eat for next week. Therefore, this sequence is diverges.
3. For a series: Every UBC student has own bank card. In my saving account, there is some interests for me. To assume A represents for my final amount, P as my initial amount, r as the rate of yearly interest, n as number of times yearly interest is compounded in one year, t as time. My series can be A=P(1+r/n)^nt.

Everything is so hard. Not only of solving problems, also some technical  problems, such as typing mathematical symbols.

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