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
Damm [24]
3 years ago
9

A geometric sequence is shown below.

Mathematics
1 answer:
S_A_V [24]3 years ago
8 0

a_1=2;\ a_2=-6;\ a_3=18;\ a_4=-54;\ a_5=162;\ ...

-----------------------------------------------------

A recursive rule for a geometric sequence:

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

r=\dfrac{a_{n+1}}{a_n}\to r=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}=...\\\\r=\dfrac{-6}{2}=-3

Therefore \boxed{a_1=2;\qquad a_n=-3a_{n-1}}

-----------------------------------------------------

The exciplit rule:

a_n=a_1r^{n-1}

Substitute:

a_n=2(-3)^{n-1}=2(3)^n(3)^{-1}=2(3)^n\left(\dfrac{1}{3}\right)\\\\\boxed{a_n=\dfrac{2}{3}\left(-3)^n}

You might be interested in
A deposit earns $102 after 36 months at a simple interest rate of 5%
Vladimir [108]

Answer:

You need to give us the possible answers first.

Step-by-step explanation:

6 0
3 years ago
What is 0+0<br> Thought since it seems like a dry land for points, today, I’d give some to ya’ll.
wel

Answer:

umm ... thx ig

Step-by-step explanation:

have a great day lol ♡♡

6 0
3 years ago
Read 2 more answers
A hemispherical tank is filled with water and has a diameter of 12 feet. If water weighs 62.4 pounds per cubic foot, what is the
Reil [10]

   Answer:

The total weight = 1286 × 62.4 = 80246 pounds.

Step-by-step explanation:

The formula of the volume of the sphere is

V = 4/3×π×r³

Given

d = 17 feet

d = 2r

r = d/2 = 17/2 = 8.5 feet

V = 4/3×π×r³

Since we need half of the volume as it is a hemispherical tank.

= 1286 ft³

Given that the weighs 62.4 pounds per cubic foot

Thus,  the total weight = 1286 × 62.4 = 80246 pounds.            

6 0
3 years ago
What is the period of the graph of y = 5 sin (4 pi x) + 3?
belka [17]
Here’s the answer and how you get it :)

8 0
3 years ago
Read 2 more answers
Write all integers between:<br>a. -17 and -12​
Neporo4naja [7]

Answer:

-16, -15, -14, -13

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Christian's furniture store buys a desk and chair at a wholesale price of $320.00 If the markup rate at Christian's store
    11·1 answer
  • Help me find x. I will mark the best explination the brainliest. Just PLEASE I need help.
    12·1 answer
  • An isosceles, obtuse triangle has one angle with a degree measure that is 50$\%$ larger than the measure of a right angle. What
    9·1 answer
  • What is the result when the number 50 is decreased by 10%
    8·2 answers
  • Gary learned that the value of his car depreciates by 15% percent per year. Which of the following functions best describes the
    13·1 answer
  • The first term of a geometric sequence is 7, and the ratio (multiplier) is 3. what is the sum of the first 5 terms of the sequen
    14·1 answer
  • What ratio is an equal ratio of 1:4?
    14·1 answer
  • Find the area of the patio
    12·1 answer
  • HELP I will mark branliest!!!!
    14·2 answers
  • How to add fractions with whole numbers.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!