A uniform time series of valua V is placed on the time axus in the following manner: the first value V at time s, the second time at 2s, the k-th value at time k.s, and the n-th value V at time n.s. Find the Balance, B0 , of this series at time 0, for the discrete interest rate Iε(-1,∞) related to 1 time unit. In solving this problem, use the concept of an equivalent interest rate, combined with function f3.