Algebra II Exercise: Geometric Sequences
By B Horn
Directions and/or Common Information:
Use an = a1rn-1 to write a rule for the following series.
2, 6, 18, 54, 162…
4, 6, 9, 13.5, 20.25…
0.5, -1, 2, -1, 8…
40, 14.8, 5.476, 2.02612…
40, -14.8, 5.476, -2.02612…
Directions and/or Common Information:
Use the following information to write the rule for the geometric sequence.a6 = 18750
r = 5
a6 = 3
r = 1/2
a9 = 472392
r = 3
a6 = 15625
r = -5
Directions and/or Common Information:
Use the following information to write the rule for the geometric sequence.a12 = 20480
a9 = 5120
a10 = 98415
a13 = 2657205
a6 = 54432
a9 = 11757312