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Se considera functiile: f(x)=x+1 g(x)=2x+2 . Calculati a)(fog)x b)(gof)x ​

Răspuns :

f(x)=x+1 g(x)=2x+2

a)(fog)x= f(g(x))=g(x)+1= 2x+2+1=2x+3

b)(gof)x= g(f(x))=2f(x)+2= 2(x+1) +2=2x+4