213k views
5 votes
Celest

Guided Practice
4. Find the next three terms in the sequence.
etric Sequences
-3, 6, -12, 24, ...
A - 48,96, -1923
hential Growth and
B 48, -96, 192
stest
C -36, 72, -144
mials
mials and Factoring
nic Equations and

1 Answer

4 votes

Answer:

A - 48,96, -192

Explanation:

Given:

geometric sequence:

-3, 6, -12, 24,

geometric sequence has a constant ratio r and is given by

an=a1(r)^(n-1)

where

an=nth term

r=common ratio

n=number of term

a1=first term

In given series:

a1=-3

r= a(n+1)/an

r=6/-3

r=-2

Now computing next term a5

a5=a1(r)^(n-1)

= -3(-2)^(4)

= -48

a6=a1(r)^(n-1)

= -3(-2)^(5)

= 96

a7=a1(r)^(n-1)

= -3(-2)^(9)

= -192

So the sequence now is -3, 6, -12, 24,-48,96,-192

correct option is A!

User Stash
by
6.0k points