Given that f(x) = 5x and g(x) = x^2 +1, find f(g(x)), g(f(x)) and g(f(2)).?
回答 (2)
2015-10-16 5:39 pm
f [ g(x) ] = 5x² + 5
g [ f(x) ] = g [ 5x ] = 25x² + 1
g [ f(2) ] = 101
g [ f(x) ] = g [ 5x ] = 25x² + 1
g [ f(2) ] = 101
2015-10-16 4:13 pm
f(g(x))=fog(x)=5(x^2+1)=5x^2+5
g(f(x))=gof(x)=(5x)^2+1=25x^2+1
gof(2)=25(2)^2+1=25(4)+1=101
g(f(x))=gof(x)=(5x)^2+1=25x^2+1
gof(2)=25(2)^2+1=25(4)+1=101
收錄日期: 2021-04-21 14:38:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151016080345AAdyjZi