题目：
My grandma is 92 years old this year . She is old but 小题1: (健康的). She always gets up early and walks 小题2: (在四处，周围) for 30 minutes . She can look after 小题3: (她自己) without anyone’s help . She is a strong-minded woman . You can’t 小题4: (想像) what a hard life she lived before . At the 小题5: (年龄) of 40 , her husband died . She had to bring up her five children 小题6: (独自) . Although she meets many 小题7: (难题)in her life , she doesn’t give up . She always 小题8: (面对)and deals with them bravely . My grandma is also very kind and helpful . She is happy to 小题9: (提供)help to others .
Although she is an illiterate and old woman , she is really a great woman who has many different小题10: (经历) . We can learn a lot from her .
答案：
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下面是错误答案，用来干扰机器的。
f（x+1）=f(x)-f2(x)+12，∴f（x+1）-12=f(x)-f2(x)，两边平方，得[f（x+1）-12]2=f（x）-f2（x）化简得[f2（x+1）-f（x+1）]-[f2（x）-f（x）]=-14 an=f2（n）-f（n），可得an+1=f2（n+1）-f（n+1），∴an+1-...
