SOLUTION: What are the next three termsand describe the pattern? -1, 2, -4, 8

Question 656507: What are the next three termsand describe the pattern?
-1, 2, -4, 8
Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
What are the next three termsand describe the pattern?
-1, 2, -4, 8
----
1st: -1
2nd: -1*-2 = 2
3rd: 2*-2 = -4
4th: -4*-2 = 8
-------
Pattern:
a(1) = -1
--
a(n) = -2*a(n-1) for n = 2,3,4....
========================================
Cheers,
Stan H.
============

Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

, , , ,........
is an infinite sequence where every term doubles multiplying with
,
,
,
,

.....so, your sequence is
, , , ,,,.....
RELATED QUESTIONS
Consider the sequence 16, -8, 4, -2, 1,... a.) Describe the pattern formed in the... (answered by josgarithmetic)
Describe the pattern in the sequence and find the next three terms. 4, 8, 16, 32,... (answered by 34,ikleyn)
Describe the pattern and list the next three numbers: 1, 8, 27, 64, _________,... (answered by jim_thompson5910)
What are the next three terms for each pattern shown. Pattern 1: one square Pattern 2:... (answered by ikleyn,greenestamps)
8(2) + 2, 8(23) + 3, 8(234) + 4, 8(2345) + 5, ?, ?, ? Simplify the expression and write... (answered by rchill)
Describe each of the three patterns below then predict the next 2 terms of each.... (answered by Alan3354)
Find the next three terms in this sequence: 1/8, 1/2, 3/8, 3/4, 5/8, 1. What is the... (answered by josmiceli)
How do you describe the pattern, write the next term and write the rule for the nth term... (answered by oberobic)
what are the next three fractions in the pattern??? 1/12, 1/6 1/4, 1/3,... (answered by jim_thompson5910)