Question

Find the common ratio of the sequence.

–4, 8, –16, 32, . . .

–2
–12
-1/-2
12

Answer 1

to find common ratio divide next term by the previous one
\[\large\rm r=\frac{ a_2 }{ a_1}~~or~~\frac{ a_3 }{ a_2} \]a_2 = 2nd term
a_3 = 3rd term

Answer 2

wouldnt the next term be 36?

Answer 3

i'm getting -9 but thats not right..

Answer 4

ratio between two numbers
in geometric you will multiply the first by common ratio to get the nexxt one
other way to solve for r
is
first term times r = 2nd term

Answer 5

\[\huge\rm a_1 \times r = a_2\] what is first term and what is 2nd one ?

Answer 6

aww i see

Answer 7

-4 and 36

Answer 8

i see what u did there
it's `common ratio` not common difference

Answer 9

now first one is -4 2nd term is what ?

Answer 10

1st term , 2nd term , 3rd, 4th term..........

Answer 11

32?

Answer 12

2 comes after 1
so what's 2nd term in this sequence `–4, 8, –16, 32, . . .`

Answer 13

8

Answer 14

right so \[\huge\rm -4r=8\] solve for r

Answer 15

2?

Answer 16

hmm positive 8 divide by `negative 4` = ?

Answer 17

-32

Answer 18

divide not multiply

Answer 19

ohh

Answer 20

-2!

Answer 21

to find common ratio we should divide 2nd term by first one
or 3rd term divide by 2nd term

Answer 22

right yahoo!

Answer 23

so i gueesed the right answer then :) thanku

Answer 24

can u help me with another?

Answer 25

2, –10, 50, –250, . . .

Answer 26

will try

Answer 27

find common ratio ?

Answer 28

yes

Answer 29

alright same steps try it!

Answer 30

divide any term with the previous one
you can divide 4th by 3rd one
3rd one by 2nd one
2nd one by first one