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√6^(n-1)=108√(2/3) uwymiernie
√6^(n-1)=36√6
(n-1)/2=5/2
n-1=5
n=6
S6=a1*(1-q^6)/(1-q)=-√3*(1-6³)/(1-√6)=215√3/(1-√6) uwymierniam
S6=215√3/(1+√6)/(-5)=43(√3+3√2)