Let f (x) = x - 3 & g (x) = 3 - x
Write the function (calculate step by step):
i) f ( g (x) )
ii) g ( f (x) )
Maths question (Function 2)
2010-10-12 12:24 am
回答 (3)
2010-10-12 8:21 am
✔ 最佳答案
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參考: My Maths knowledge
2010-10-13 6:13 pm
It shouldn't be big~ Just a little mistake~ Yet, your helping action is so quick~ TKS anyway !
2010-10-12 12:26 am
i) f[g(x)]
= f(3-x)
= (3-x) - 3
= -x
ii) g[f(x)]
= g(x-3)
= 3 - (x-3)
= 3 + 3
= 6
2010-10-12 18:22:39 補充：
Lol, I made a big careless mistake in (ii)
= f(3-x)
= (3-x) - 3
= -x
ii) g[f(x)]
= g(x-3)
= 3 - (x-3)
= 3 + 3
= 6
2010-10-12 18:22:39 補充：
Lol, I made a big careless mistake in (ii)
參考: Knowledge is power.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101011000051KK00656