Sign In
Ask Question
Figaro
Mathematics
14 August, 18:02
5,-15,45,-135,? what is the next number
+1
Answers (
2
)
Chandler
14 August, 18:11
0
405 ...
Comment
Complaint
Link
Jazlyn Blair
14 August, 18:13
0
This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by
3
gives the next term. In other words,
a
n
=
a
1
⋅
r
n
-
1
.
Geometric Sequence:
r
=
3
This is the form of a geometric sequence.
a
n
=
a
1
r
n
-
1
Substitute in the values of
a
1
=
5
and
r
=
3
.
a
n
=
(
5
)
⋅
(
3
)
n
-
1
Remove parentheses.
a
n
=
5
⋅
3
n
-
1
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“5,-15,45,-135,? what is the next number ...”
in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
The square root of 5x+6=x (solve)
Answers (1)
Jenny can type at a speed of 80 words per minute. It took her 20 minutes to type a report. How many times words was the report?
Answers (1)
A group of dancers raised some money for a charity here is some information about the money raised One of the dancers is chosen at random to give the money raised to the charity What is the probability that this dancer raised less then £10
Answers (1)
A canoe travels 3 3/4 kilometers in 3/5 of an hour. What is the average speed of the canoe, in kilometers per hour. A) 4/9 B) 2 1/4 C) 5 5/12 D) 6 1/4
Answers (2)
At Kim's birthday party, there were 42 guests. If each guests ate 1/6 of a cake (and there was no cake leftover), how many cakes were there?
Answers (1)
New Questions in Mathematics
What are the advantages and disadvantages of using cumulative frequency?
Answers (1)
20 min to drive between two roads at average speed 45 mph how far apart is the town
Answers (1)
What is 2+2 i need to know
Answers (1)
A track and field playing area is in the shape of a rectangle with semicircles at each end. The perimeter of the track is to be 1200 meters.
Answers (1)
Nicole has a stack of 50 dishes to wash. It took her 2 minutes to wash 8 dishes. At this rate, how long will it take Nicole to wash all 50 dishes?
Answers (1)
Home
»
Mathematics
» 5,-15,45,-135,? what is the next number
Sign In
Sign Up
Forgot Password?