Respostas

2013-11-25T18:49:04-02:00
A)f(g(x)) = x^4  - 3x² +1

b) b)g(f(x)) = (x²-3x+1)² = (x²-3x+1) .(x²-3x+1)

x^4 -3x^3 +3x² -3x³ +9x² - 3x + x² - 3x +1
x^4 -6x³ +13x² - 6x +1