题目

Dear son,    The day that you see me old and I am already not in good health, have patience and try to understand me.    If I get dirty when eating, if I can not dress, have patience and remember the hours I spent teaching it to you. If, when I speak to you, I repeat the same things thousand and one times, do not interrupt me, listen to me. When you were small, I had to read to you thousand and one times the same story until you got to sleep. When I do not want to have a shower, neither shame me nor scold me. Remember when I had to chase you with thousand excuses I invented, in o有一列数，第一个数是1，第二个数是4，第三个数记为x3，以后依次记为x4，x5，…，xn，从第二个数开始，每个数是它相邻两个数的和的一半．（1）求x3，x4，x5，x6，并写出计算过程；（2）探索这一列数的规律，猜想第k个数等于什么？并由此算出x2008是多少？