A geometric sequence is defined by the equation an = (2)5 − 2n. Part A: What are the first three terms of the sequence? Part B: What is the value of r? Part C: What is the value of a10?
geometric sequence
an=25−2n
n=1:a1=25−2⋅1=23=8n=2:a2=25−2⋅2=25−4=21=2n=3:a3=25−2⋅3=25−6=2−1=12r=a3a2=122=14r=a2a1=28=14n=10:a10=25−2⋅10=25−20=2−15=121