Question

Find the 7th term of the geometric sequence with the given terms:
a2 = 768 and a4 = 48; a7 = _____.

Answer 1

u know d formula ryt ? plz write it

Answer 2

I have it written down, but I'm homeschooled. I learn by watching videos of this guy that explains it. Math is really hard for me and I just don't get it. Today is my last day to finish this class or else I'll fail. I desperately need help. That's why I keep asking. I only have a couple hours left to finish.

Answer 3

ok

Answer 4

an = ar^(n-1)
So we have for a2

768 = ar^(2-1)
ar^1 = 768 ------ eqn 1

For a4
ar^ (4 -1) = 48
ar^3 = 48 --------- eqn 2

Sp from equation 1, a = 768/ r
Substitute (768/r) (r^3) = 48
768r^2 = 48
r^2 = 48/768
r^2 = 1/16
r = 1/4

Now we want to find what a is actually, so using eqn 1
ar^1 = 768
Substituting for r
a (1/4) = 768
a = 768 * 4
a = 3072
now for
a7
an = ar^(n-1)
if a = 3072, n = 7, r = 1/4

a7 = 3072 * (1/4)^ (7-1)
a7 =0.75

Am sorrry am kinda slow not that fast at typing

Answer 5

It is totally fine. You have no idea how much you are helping me

Answer 6

you gat anymore? kuz i will soon be leaving?

Answer 7

u gat anymore?? i will soon be leaving

Answer 8

Find the indicated sum for the geometric series.
S6 for 2 +1 + 1/2 + 1/4 + ...