a) 0.(8) = 8/9b) 1,2(53) = 13/9
беск. убыв. геом. прогресс.a) q = -1/3, b1 = 9bn = b1 q^(n-1) = 9 (-1/3)^(n-1) = 9 (-1/3)^(n-1)b) bn = 2 (-4)^n
a) 0.(8) = 8/9
b) 1,2(53) = 13/9
беск. убыв. геом. прогресс.
a) q = -1/3, b1 = 9
bn = b1 q^(n-1) = 9 (-1/3)^(n-1) = 9 (-1/3)^(n-1)
b) bn = 2 (-4)^n