Week #10

This week, the second term test result has come out, which frustrated me. I remember that when I first saw the test paper, there were only three prove questions and it seemed like i had done them before because it looked familiar. But actually, like the last test, I spent too much time on the first two questions and when I moved on to the last question, I realized that I didn't have enough time to finish. After the test, I heard that the second question is the most difficult and the last one is pretty easy. But what I did is just opposite because I get a full mark of proof on questions two but get 0 on question three.That looks ridiculous. The most regretful thing is that the question that I get 0 is the one that appears on assignment2 which is just due before the test. Although I use a more complicated way to solve it in assignment , I should have done it on the test.I felt like I could have enough time to finish it, then I was so careful to do first two that I forgot the time, which is the main problem. Also, I always think that what if I get more familiar for the stuff that is tested, this result may not happen to me.

It has already been two tests, and only one final left. I can't loose chance to get high mark next time, so I really need to look everything carefully and get familiar with the whole bunches of knowledge that I have learnt in this course.

problem solving:

 if we want to prove something equal, we have to show as following: