Помогите пожааалуйста!!!
S(n) = b₁*(qⁿ-1)/(q-1) b₁ = 1 q = 4 S(14) = (4¹⁴-1)/3 S(7) = (4⁷-1)/3 S(14)/S(7) = (4¹⁴-1)/(4⁷-1) =(4⁷+1)*(4⁷-1)/(4⁷-1) = 4⁷+1 = 16385