Posted by lexi on .
find (FxG)(X) and (GxF)(X) when f(x)=5x^21 and g(x)=2/x

algebra 
Sally's friend,
f(g(x))=5(2/x)^21 put g in for x
=5(4/x)1 Exponents
=(20/x)1 This is it or get
= (20/x)(x/x) LCD
= (20x)/x
Solution: (20/x)1 OR (20x)/x
g(f(x))=2/(5x^21) put f in for g
This is simplified