Question

Va rog la exercițiul 3

Answer 1

trebuiesc calculate ecuatiile alea

a) 17x+9=-8

17x=-8-9

17x=-17=>x=-1=>A={1}

c) -7+(-2)× 5x=-7

-7-10x=-7

-10x=-7+7

-10x=0=>x=0 daca x∈Z cu steluta=>C=∅

b) 11x+14=36

11x=36-14

11x=22=>x=22:2=>x=2=>B={2}

d) -2(-4)x+2 la puterea =3²

8x+1=9=> 8a=9-1=>8x=8=>x=1=>D={1}