Question

Write the recursive formula for the geometric sequence.

a1 = -2 a2 = 8 a3 = -32
A. an = -4 + an-1

B. an = -2 + an-1

C. an = -2 • an-1

D. an = -4 • an-1

Answer 1

the common ratio is 8 / -2 = -4

so to get next term you multiply previous by -4

- that should help you choose the correct option

Answer 2

I am seriously still confused

Answer 3

I multiply each number by -4?

Answer 4

an stands for the term being calculated
an-1 = previous term
and the way to form next term is by multiplying previous by -4

eg -2 * -4 = 8
and -32*-4 = 128

Answer 5

so it would be D?

Answer 6

yup - thats it D

Answer 7

seriously?

Answer 8

okay it was right

Answer 9

thank you

Answer 10

yw