Given the sequence, 2, 6, 18, 54, .... find a_{8}
Given a_1=3 and r = -2, find S_{8}
Given the sequence 12,3,\frac{3}{4} .... find S_{5}
Round to the nearest hundredth (two decimal places).
Given the sequence 27, 9, 3, 1 ... find the infinite sum.