更新1:
thank you!!
f(x) * f(x) ???????????????????
回答 (2)
2010-02-16 2:26 am
✔ 最佳答案
Nope. The only way we can re-write this is as:[f(x)]^2.
For example, if we let f(x) = x^2 + 1. We see that:
f(x) * f(x) = (x^2 + 1) * (x^2 + 1) = x^4 + 2x^2 + 1.
But:
f(x^2) = (x^2)^2 + 1 = x^4 + 1.
See the difference?
I hope this helps!
2010-02-16 10:21 am
no. it's gotta be [f(x)]^2
收錄日期: 2021-05-01 00:45:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100215181626AAoW9OW