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
GIVING BRAINLIEST FOR BEST ANSWER!
ICE Princess25 [194]

Answer:

13/10

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Which of the following graphs is the graph of a linear function?
ziro4ka [17]

Answer:

C

Step-by-step explanation:

A and B are not straight lines, so they are not linear functions.

C and D are straight lines, so they are linear. However, D fails the vertical line test, so it is not a function.

3 0
3 years ago
Malik’s solution to the equation 2/5x-4y=10 , when x=60, is shown below.
zhenek [66]

Answer:

D. Malik substituted 60 for y instead of x.

Step-by-step explanation:

Look closely at the step by step process.

4 0
3 years ago
Read 2 more answers
How do I Express the inequality x < 7 using interval notation.
Sedaia [141]

Answer:  (-\infty, 7)

You can write this as (-infinity, 7) if you aren't able to use the infinity symbol.

====================================================

Explanation:

Think of x < 7 as writing -\infty < x < 7

So x is between negative infinity and 7, excluding both endpoints.

To write -\infty < x < 7 in interval notation, we write (-\infty, 7)

The curved parenthesis tell us to exclude the endpoint.

7 0
3 years ago
In the figure, angle A measures 41° and angle D measures 32°. What is the measurement of angle E?
netineya [11]

triangles angles always add up to 180° that being said,

41+32=73

180-73=107

angle e= 107°

hope this helps!

6 0
3 years ago
Read 2 more answers
Other questions:
  • Please answer right away
    7·1 answer
  • The length of a triangel is three times its with.if the perimiter is at its most 112 centemeters,witch is the greates possible v
    12·1 answer
  • Janie has 4 pieces of fruit. Two of the pieces of fruit are bananas. Write two fractions that describe the fraction of fruit tha
    11·2 answers
  • HELP HELP THERE IS A PIC ATTACHED HELP HELP PLZ GOBE A REAL ANSWER
    11·1 answer
  • Please help me with answer I need help now
    8·2 answers
  • 2 thirds divided by 4
    14·1 answer
  • 5x – 12 = 13<br><br> 8(x + 3) = 64<br><br> using algebra
    12·2 answers
  • p is directly proportional to the square of q. it is known that p=12 for a certain value of q. find the value of p when q is dou
    12·1 answer
  • Find the perimeter. Simplify your answer.
    13·2 answers
  • This is your question​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!