Question

What is the 8th term of the geometric sequence where a1 = 243 and a4 = 9?

Answer 1

243 ,243r,243r^2,9
243*r^3=9
r=1/3

Answer 2

As the magnitude of the numbers decreases, its safe to assume you are dealing with division or subtraction. Division would say:
243 /x =a2
a2/x = a3
a3/x = 9

Answer 3

so can u find now? @lkiamx

Answer 4

where did the 243 go?

Answer 5

also, how did u get 1/3??

Answer 6

243 is the first term
243/3=81
81/3=27
27/3=9
bcz r=1/3
ok?

Answer 7

@lkiamx is it clear?

Answer 8

Every new step of the sequence, you divide by 3 as sorour answered.

Answer 9

@sorour yes :)

Answer 10

@TimSmit okay, I get it now

Answer 11

@lkiamx good

Answer 12

Thanks for helping me :) have a nice day

Answer 13

ur welome,nice dayfor u too :)

Answer 14

You too :)