Respostas

2014-08-04T21:33:08-03:00
A) f(g(x)) = 0
3(2x-3)+5
6x-3+5
6x+2 
Resolvendo:
6x+2=0
6x=-2
x=-2/6
x=-3
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b) g(f(x))=1
2(3x+5)-3
6x+5-3
6x+2
Resolvendo:
6x+2=1
6x=-2+1
6x=-1
x=6/1
x=6