Răspuns:
Explicație pas cu pas:
b1 = 1
b2 = 1,13
b3 = 1,13*1,13 = 1,2769
b4 = 1,2769*1,13 = 1,442897
b5 = 1,442897*1,13 = 1,63047361
b6 = 1,63047361*1,13 = 1,842435179
b7 = 1,842435179*1,13 = 2,081951753
b8 = 2,081951753*1,13 = 2,35260548
S = 12,75726302