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a E(x)= (1/x-1-2/x+1/x+1):1/x-1


Răspuns :

Răspuns:

a) E(x)= (1/x-1-2/x+1/x+1):1/x-1=

(2/x-2/x-1+1):1/x-1=

(0+0):1/x-1=0×x-1=0-1=-1

x≠0 E(x)=-1