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(3^10+3^11+3^12):(3^9+3^10+3^11)=

Răspuns :

(3^10+3^11+3^12):(3^9+3^10+3^11)=(3^10+3^10*3+3^10*9):(3^9+3^9*3+3^9*9)=(3^10+3^10*3+3^10*9):(3^9+3^9*3+3^9*9)=(3^10*13):(3^9*13)=3
(3¹⁰+3¹¹+3¹²):(3⁹+3¹⁰+3¹¹)=3¹⁰*(1+3+9) : 3⁹(1+3+9)= 3¹⁰: 3⁹= 3¹ =3