问题
填空题
用秦九韶算法计算f（x）=3x3+2x2+x+1在x=2时的函数值为 ______．
答案
f（x）=3x3+2x2+x+1
=x（3x2+2x+1）+1
=x[x（3x+2）+1]+1
把x=2代入，计算得：
f（2）=35．
故答案为：35．
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用秦九韶算法计算f（x）=3x3+2x2+x+1在x=2时的函数值为 ______．
f（x）=3x3+2x2+x+1
=x（3x2+2x+1）+1
=x[x（3x+2）+1]+1
把x=2代入，计算得：
f（2）=35．
故答案为：35．
| 根据句意，用所给动词的正确形式填空。 |
| 1. He usually goes to school by bus, but today he ________(walk) to school. 2. ________ you ________(have) any eggs for breakfast yesterday? 3. There ________(be) some bread in the box yesterday. 4. Sam ________(be) here half an hour ago. 5. — Where ________ you ________(meet) the famous actor? — I met him in Beijing. |