sea f(x)=x^2-2x y g(x)=x+5
(fog)(x)=
(gof)(x)=
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Okay okay...
(fog)(x)= f(g(x)) = (x+5)^2 - 2(x+5)
= x^2 + 10x + 25 - 2x -10
=x^2 + 8x +15
(gof)(x)= g(f(x)) = (x^2-2x) + 5
=x^2 - 2x +5
(fog)(x)= f(g(x)) = (x+5)^2 - 2(x+5)
= x^2 + 10x + 25 - 2x -10
=x^2 + 8x +15
(gof)(x)= g(f(x)) = (x^2-2x) + 5
=x^2 - 2x +5
Fanny26450:
Muchas gracias c:
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