Consider the geometric sequence 1, 6, 62, 63, .... If we writes, for the sum of the first k terms of the sequence, what is b5s? bs = 65+65 +6 +63 +6 +6 Obs=15+*+b+ba+b+1 055 = b +05+b+bP+62+0+1 bSs 6 +60 +65 +6 +63 +6+0 1 bs, 65+6 +63 +6 +6 bs = ++32+ X