Question

Find the 14th term in the sequence for 32, 16, 8, 4, 2, 1, 1/2, 1/4

Answer 1

Do you know which formula to apply?

Answer 2

14th term = first term * (ratio)^14

= 32 * (0.5)^14

Answer 3

the formula is An=A1r ^n-1

Answer 4

Yep, now plug the numbers in :)

Answer 5

yes, i did that, no how do i find the 14th term/ answer

Answer 6

a_1 = 32
r = ?

Answer 7

r=2

Answer 8

What does that mean?

Answer 9

Oops, 32r = 16 -> r = 16/32 = ?

Answer 10

whats the 14th term

Answer 11

You can't find a_n, if you don't have r yet!

Answer 12

R is 2.. R is the difference in the sequence

Answer 13

It's incorrect, because the sequence decreasing!
So you can't say r = 2 ( double increasing)

Answer 14

Its Geometric you divide 2 every time so its 2

Answer 15

divide by 2 => r = 1/2, not 2!

Answer 16

okay so what the 14th sequence

Answer 17

Now, plug a_1 and r into the forumula!

Answer 18

i know! what is the answer

Answer 19

Do you have YOUR answer, I'll check it!

Answer 20

nevermind.... i dont know it, so ill just get an F.

Answer 21

Why o.O
all you do is plug 32* (.5)^13

Answer 22

What's so hard to plug the number into your calculator???