Răspuns:
81
Explicație pas cu pas:
(3⁷⁰-3⁶⁸):(3⁶⁶-3⁶⁴)=
= [3⁶⁸·(3²-1)]:[3⁶⁴·(3²-1)] =
= 3⁶⁸·8 : (3⁶⁴·8) =
= 3⁶⁸:3⁶⁴ = 3⁶⁸⁻⁶⁴ = 3⁴ = 81
[tex]\it = \dfrac{3^{68}(3^2-1)}{3^{64}(3^2-1)}=\dfrac{3^{68}}{3^{64}}=3^{68-64}=3^4=81[/tex]
