1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Brut [27]
3 years ago
11

What is the recursive formula for this geometric sequence? -3, -21, -147, -1029, ...

Mathematics
2 answers:
den301095 [7]3 years ago
4 0

a_{n+1} =7a_{n}.

If we know the term n^{th} and the common relation, r, of a geometric sequence, you can find the term (n+1)^{th} using the recursive formula a_{n+1} =a_{n}.r.

The first term of the geometric sequence is a₁ = -3.

The common relation we have to find the relationship between a term and the term that precedes it.

r=\frac{-21}{-3} = 7

The recursive formula is:

a_{1} =-3

a_{n+1} =7a_{n}

Simora [160]3 years ago
3 0

a_1=-3\\r=7\\a_n=a_{n-1}\cdot r\\\\ \boxed{a_n=7a_{n-1}}

You might be interested in
Causal models a. provide evidence of a causal relationship between an independent variable and the variable to be forecast. b. u
marshall27 [118]

Answer:A. provide evidence of a causal relationship between an independent variable and the variable to be forecast

Step-by-step explanation: Casual model tends to show the cause and effect relationship between the dependent variable to be forcasted and the independent variables upon which the dependent variable is dependent.

Casual model is frequently used in the field of Statistics and Economics when making forcasts about future investments or the cause of certain events,knowing what activities to carry out in the future.

7 0
3 years ago
Quadrilateral A has side lengths 6, 9, 9, and 12. Quadrilateral B is a scaled copy of Quadrilateral A, with its shortest side of
Alekssandra [29.7K]

Answer:

Look below

Step-by-step explanation:

Ok, you got a Quadrilateral with the side lengths 6, 9, 9, 12

The shortest of B is 2

Find the scale factor of the A to B

6 -> 2

6/2 = 3

Scale factor is 3

Now divide all the sides by scale factor

6/3, 9/3, 9/3, 12/3 = 2, 3, 3, 4

Add them all together to get the perimeter

2+3+3+4 = 12

Perimeter of B is 12

5 0
3 years ago
How to do this problem
gavmur [86]
I forget sorry I’m very sorry I don’t even know elegy I commented
4 0
3 years ago
Since some people need the points, here’s a question where you’ll just need to answer it with anything and I give it 5 stars and
mezya [45]

Answer:

thank you very much

Step-by-step explanation:

4 0
3 years ago
Please help me, I can't understand​
nikklg [1K]

Step-by-step explanation:

a) 3x>x+5

b)2x>5

x>5/2

ii) I'm unable to draw a number line but draw a small circle right in-between+2 and +3 and let the direction be rightward

4 0
2 years ago
Read 2 more answers
Other questions:
  • Hey, I do not want the answer but could someone please explain to me on HOW to find the area of this figure? I forget how to :P
    12·1 answer
  • Show the work please
    7·1 answer
  • \qquad
    5·2 answers
  • Linda has two cats. The difference in weight of her Maine Coon and Siderian is at least 6 pounds. Linda's Siberian has a height
    12·2 answers
  • How do I solve this?
    11·1 answer
  • HELP PLZ
    10·1 answer
  • A speed of 220 feet per minute is equal to how many miles per hour​
    6·1 answer
  • The expression 15w + 65 factored using the gcf is?
    9·2 answers
  • PLZ HELP
    9·1 answer
  • Triangles IJK and LMN are similar. Find y using proportions. Explain and show all your steps.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!