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
Umnica [9.8K]
3 years ago
14

What is the sum of a geometric sequence 1, 3, 9, ... if there are 12 terms?

Mathematics
1 answer:
attashe74 [19]3 years ago
4 0
We know that
a1=1
a2=3
a3=9
a2/a1=3/1----> 3
a3/a2=9/3----> 3
<span>common ration r is equal to 3
number of terms n  is 12

The </span><span>Sum of geometric series is given by the formula
</span>Sum=a1*[1-r<span>^n]/[1-r]
</span>Sum=1*[1-3^12]/[1-3]-----> Sum=[1-3^12]/[1-3]----> [3^12-1]/[3-1]
<span>Sum=531440/2-----> 265720

the answer is
265720



</span>
You might be interested in
What is the value of -16?<br> A. -4<br> B. -4i<br> C. 4i<br> D. 4;2
hammer [34]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Why is the sum of two negative numbers not a positive number
pychu [463]

Answer:

because when two negatives are together they can't add

Step-by-step explanation:

because when two negatives are together they can't add no matter if there's an addition sign

7 0
3 years ago
Which of the following functions is graphed below?
Irina18 [472]

Answer:

fat bit

fat old ugly

Step-by-step explanation:

5 0
2 years ago
The table above lists the frequencies of the C major key.
Talja [164]
Sj ebfbruejnxjjendnzjejnzzkijeskao
7 0
2 years ago
A small school with 606060 total students records how many of their students attend school on each of the 180180180 days in a sc
charle [14.2K]

Answer:

bbbcadacdababcada

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • A doctor wants to start a business that produces medical equipment. though she is an expert on medicine, she realizes she'll nee
    11·1 answer
  • A rectangular park has an area of 250 square feet. The length of the park is 7 feet more then twice the width, w of the park. Wh
    9·2 answers
  • Write the equation of a line passing through (5,2) parallel to y=4x-3
    7·1 answer
  • A recipe calls for 2 teaspoons of Adele and 3/4 cup of sugar compute the unit rate for vanilla of sugar show your work
    5·1 answer
  • Mario has a remaining balance of $1,300 on his credit card. His credit card has an APR of 20 percent. How much will he pay in in
    15·1 answer
  • S. Which equation represents a line parallel to y = 3x + 2 and passes through (4, 1)?
    11·1 answer
  • What are three consecutive integers whose product is 480 more than their sum?
    11·1 answer
  • The sum of two numbers is 58.the smaller number is 12 less than the larger number.what are the numbers?
    15·2 answers
  • 7 hours equals how many seconds
    6·2 answers
  • Rosters Chicken advertises​ "lite" chicken with​ 30% fewer calories than standard chicken. When the process for​ "lite" chicken
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!