S = b1 / (1 - q) = 49/ (1 - 1/7) = 49 /(7/7 - 1/7) = 49/ (6/7) = 343/6
b1 = 49
b2 = 7
q = b2/b1 = 1/7
S = b1 / (1 - q) = 49/ (1 - 1/7) = 49 /(7/7 - 1/7) = 49/ (6/7) = 343/6
b1 = 49
b2 = 7
q = b2/b1 = 1/7