更新1:
How would I do this question, I couldn't add the picture so here's the URL https://i.gyazo.com/adabd2e0933df6e036d19420e0095125.png
How would you do this maths binomial expansion question? I have no idea. <https://gyazo.com/adabd2e0933df6e036d19420e0095125>?
回答 (1)
2016-08-02 5:33 pm
(1 + 5x)⁹ = 1 + 45x + 900x² + ......
Put x = 0.01 :
[1 + 5*(0.01)]⁹ = 1 + 45*(0.01) + 900*(0.01)² + ......
When n ≥ 3, (0.01)ⁿ becomes very small and can be negligible.
Hence, [1 + 5*(0.01)]⁹ ≈ 1 + 45*(0.01) + 900*(0.01)²
(1.05)⁹ ≈ 1.54
Put x = 0.01 :
[1 + 5*(0.01)]⁹ = 1 + 45*(0.01) + 900*(0.01)² + ......
When n ≥ 3, (0.01)ⁿ becomes very small and can be negligible.
Hence, [1 + 5*(0.01)]⁹ ≈ 1 + 45*(0.01) + 900*(0.01)²
(1.05)⁹ ≈ 1.54
收錄日期: 2021-04-18 15:27:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160802090750AAgF4Yg