Dadas as funções?

f(x)=3x-2 e g(x)=x²+x+2, clacule:

a)f(g(x))

b)g(f(x))

c)f(f(x))

d)g(g(x))

Comments

  • Veja:

    a)f(g(x))=3(x²+x+2)-2

    f(g(x))=3x²+3x+6-2

    f(g(x))=3x²+3x+4

    b)g(f(x))=(3x-2)²+3x-2+2

    g(f(x))=9x²-12x+3x

    g(f(x))=9x²-9x

    c)f(f(x))=3(3x-2)-2

    f(f(x))=9x-6-2

    f(f(x))=9x-8

    d)g(g(x))=(x²+x+2)²+x²+x+2+2

    g(g(x))=x^4+2x³+5x²+4x+4+x²+x+4

    g(g(x))=x^4+2x³+6x²+5x+8

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