Question

Find the ninth term of this sequence: 81/8, 27/4, 9/2, 3,...

Answer 1

what do you think about the sequence, ap? gp?

Answer 2

whats ap, gp?

Answer 3

ap, arithmetic progression
gp, geometric progression

Answer 4

Ooo im not sure about that stuff

Answer 5

try to find the difference between the numbers
for ap, second one minus the first one, for gp, second one divide the first one

Answer 6

oh okaay

Answer 7

for gp use
\[t_n=ar^{n-1}\]
since its ninth term,
a=81/8, r=3/2
\[t_9=(81/8)(3/2)^{9-1}\]
solve

Answer 8

is that a g next to the t?

Answer 9

its 9

Answer 10

oh ok sorry its a little blurry to me on my computer.

Answer 11

i got 259.4..