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
frosja888 [35]
3 years ago
12

The common ratio of a geometric series is 3 and the sum of the first 8 terms is 3280.

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
6 0

Answer:

The first term of the geometric series is 1

Step-by-step explanation:

In this question, we are tasked with calculating the first term of a geometric series, given the common ratio, and the sum of the first 8 terms.

Mathematically, the sum of terms in a geometric series can be calculated as;

S = a(r^n-1)/( r-1)

where a is the first term that we are looking for

r is the common ratio which is 3 according to the question

n is the number of terms which is 8

S is the sum of the number of terms which is 3280 according to the question

Plugging these values, we have

3280 = a(3^8 -1)/(3-1)

3280 = a( 6561-1)/2

3280 = a(6560)/2

3280 = 3280a

a = 3280/3280

a = 1

You might be interested in
PLEASE EXPLAIN <br> I wil give brainiest
Advocard [28]

Answer: (-2, -2)

Step-by-step explanation:

Reflection over the x-axis: (x, y) → (x, -y)

(-2, 2) → (-2, -2)

x would remain the same but the y would turn negative since we're reflecting over the x-axis. The x never changes in this situation but since we're flipping it over the x-axis, they y has to be negative.

Hope this helps!

8 0
3 years ago
Solve<br> plz -4p-2r-15p
IrinaVladis [17]

Answer:

-2r-19p

Step-by-step explanation:

-4p-2r-15p

add like terms

-2r-19p

3 0
3 years ago
Which human organ is shown in the image? Heart Liver Pancreas Stomach​
TiliK225 [7]

Answer: Pancreas

Step-by-step explanation:

The Pancreas is shown.

Please leave mark as brainliest if I helped you out. :)

8 0
1 year ago
51. Find the length of the unknown side x of this triangle, evaluate your answer to two decimal places.
KiRa [710]

Answer:

x=6

Step-by-step explanation:

hope this helped!!

4 0
2 years ago
Read 2 more answers
Which theorem shows WQD = XRD
daser333 [38]

Answer:

SAS

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Please answer asap question attached, its not too hard
    14·2 answers
  • How many factors are in the expression x(1+y)z
    9·1 answer
  • Helps me solve the problem please
    13·1 answer
  • For the given expression, which whole number (w) will make the expression true? 5/6
    9·1 answer
  • Find the perimeter of the shape below r(-1,3) s(-2,7) t(2,5) u(-1,3)
    13·1 answer
  • When given the lengths of the diagonals of a kite, which statement best explains how to find the area?
    13·2 answers
  • Amanda saves $15 per week for her summer vacation. Write an equation that she can use to.Find S, her savings after W weeks
    15·1 answer
  • Determine if the expression x is a polynomial or not. If it is a
    7·1 answer
  • A jewelry store buys a gold watch sell.
    7·1 answer
  • Solve this equation x/4-20=-12
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!