Răspuns:
2.a)(f•f)(x)=f(f(x))=f(2x)=2×2x=4x
(f•f•f)(x)=f(f(f×)))=f(f(2x))=f(4x)=2×4x=8x
(f•f•f•f)(x)=f(f(f(f×))))=f(8x)=2×8x=16
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( f•f•...•f)(x)=2×nx
b)(g•g)(x)=g(g(x))=g(2x+5)=2(2x+5)+5=4x+15
(g•g•g)(x)=g(g(g(x)))=g(4x+15)=2(4x+15)+5=8x+35
(g•g•g•g)(x)=g(g(g(g(x))))=g(8x+35)=2(8x+35)+5=16x+75
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(g•g•...•g)(x)=2[nx+5(n-1)]+5
Sper ca te-am ajutat!
