Given that f(x) = 5x and g(x) = x2 +1, find f(g(x)), g(f(x)) and g(f(2)).?
回答 (1)
2015-10-07 3:53 pm
f(x) = 5x
g(x) = x² +1
f(g(x))=5(x²+1)=5x²+5
g(f(x))=(5x)²+1=25x²+1
g(f(2))=25(2)²+1=4•25+1=101
f(2)=5(2)=10
g(10)=(10)²+1=100+1=101
g(x) = x² +1
f(g(x))=5(x²+1)=5x²+5
g(f(x))=(5x)²+1=25x²+1
g(f(2))=25(2)²+1=4•25+1=101
f(2)=5(2)=10
g(10)=(10)²+1=100+1=101
收錄日期: 2021-04-21 14:35:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151007052221AACU1no