Practice over Geometric Sequences - writing the rules and finding the nth term.

Write the rule and find a6
{2, -8, 32, -128, ...}
Write the rule and find a6.
{8, 24, 72, 216, ...}
Write the rule and find a6 .
{135, 90, 60, 40, ...}
Write the rule and find a6 .
{-3200, 800, -200, 50, ...}
Use the informative give to find the indicated value.
a5 = -68 and r = -0.5; find a1
Use the information given to find the indicated value. HINT: Plug in the information you have to find "r" first.
a1 = 13 and a4 = 4459; find a3
Use the given information and find the indicated value. HINT: Plug in the information you have to find "r" first.
a2 = 6 and a5 = 6/125; find a4
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
{-2, 10, -50, 250,...}
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
{4, 8, 20, 60, ...}
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
{2, 4, 16, 256, ...}
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
{-2, -14, -98, -686, ...}
Determine whether the sequence is geometry. If yes, identify the common ratio and give the next three terms.
{3.2, 8, 20, 50, ...}
Write a rule for each sequence, then find a6.