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Calculati (f*g)(-2). unde f:R->R, f(x)= 3x-4 si g:R->R, g(x)=2x+5

Răspuns :

f(g(-2))=f(1)=-1

g(-2)=-4+5=1


f(g(-2)) , iar g(-2)=2x(-2)+5=-4+5=1, iar f(1) =3x(1)-4=3-4=-1 rezulta ca (f steluta g)(-2)= -1. Sper ca ai inteles !:)