設f(x)=(x^4+2x^3-3x^2-1)(x^3-x^2+3),試求f(x)的展開式中x^3項的係數。?

2017-04-03 9:35 am
更新1:

求算式

回答 (3)

2017-04-03 8:33 pm
Sol
f(x)=(x^4+2x^3-3x^2+0x-1)(x^3-x^2+0x+3)
2*3+(-3)*0+0*1+(-1)*1
=6-1
=5
2017-04-03 9:49 am
求算式!
2017-04-03 9:42 am
5


收錄日期: 2021-04-30 22:10:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170403013516AA2Q9FQ

檢視 Wayback Machine 備份