f(x)=2x+1 and g(x)=x^2+3
Find
a) f (-5)
b) g[ f (-5) ]
c) Find and simplify g [f (x)]
math----
2007-08-12 8:10 pm
回答 (3)
2007-08-12 8:19 pm
✔ 最佳答案
a.f(-5)=2(-5)+1=-9
b.g[f(-5)]=(-9)^2+3
=84
c.g[f(x)]=(2x+1)^2+3
=4x^2+4x+1+3
=4x^2+4x+4
2007-08-12 8:43 pm
a)2*-5+1=-9
b)g(-9)=-9^2+3=84
b)g(-9)=-9^2+3=84
2007-08-12 8:17 pm
f(-5)=2*(-5)+1=-9
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g[f(-5)]=(-9)^2+3=84
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g[f(x)]=(2x+1)^2+3=4x^2+4x+1+3=4(x^2+x+1)
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g[f(-5)]=(-9)^2+3=84
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g[f(x)]=(2x+1)^2+3=4x^2+4x+1+3=4(x^2+x+1)
收錄日期: 2021-04-13 13:57:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070812000051KK01545