вычислите lim (2/3^n+1)-4

\lim_{n \to \infty} \left(\frac{2}{3^{n+1}}-4\right)=\left(\frac{2}{3^{\infty+1}}-4\right)=\left(\frac{2}{3^\infty}-4\right)=\\ =\left(\frac{2}{\infty}-4\right)=\left(0-4\right)=-4