(1)求(1+x+x2+x3)(1-x)7的展开式中x4的系数;(2)求(x+4 发布时间:2017-05-16 07:07 │ 来源:www.tikuol.com 题型:解答题 问题: (1)求(1+x+x2+x3)(1-x)7的展开式中x4的系数;(2)求(x+4x-4)4的展开式中的常数项;(3)求(1+x)3+(1+x)4+…+(1+x)50的展开式中x3的系数.
题型:解答题 读一读,补全短文。ate sat liked had watched went excited Last week, I had my first trip on an airplane. It was fun! I 1. nextto the window. I saw houses, parks, and swimming pools on the ground.They were all very small! I 2. the food on the airplane. I 3. chicken, rice, icecream and a candy bar. I drank orange juice. I 4. TV too.I 5. it a lot. My aunt met me at the airport and we got home very late.I was very 6. and I had a dream that night. In my dream I 7. on atrip again. 查看答案
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