Don't understand this math function?
回答 (1)
2010-02-16 2:55 am
✔ 最佳答案
If f(x) ≤ 0 means the function's range is all non-positive numbers, then all values of x in the domain of f(x) result in values that are ≤ 0. If x² is in the domain of f, then f(x²) ≤ 0
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100215185110AAGDmIl