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
noname [10]
3 years ago
11

Is 3, 1, 1/3, 1/9,... a geometric sequence?

Mathematics
1 answer:
barxatty [35]3 years ago
7 0
a_1;\ a_2;\ a_3;\ a_3;\ ...;\ a_n;\ a_{n+1};...\ is\ a\ geometric\ sequence\\if\ a_{n+1}:a_n=const.\\-------------------\\a_1=3;\ a_2=1;\ a_3=\dfrac{1}{3};\ a_4=\dfrac{1}{9}\\\\a_4:a_3=\dfrac{1}{9}:\dfrac{1}{3}=\dfrac{1}{9}\cdot\dfrac{3}{1}=\dfrac{1}{3}\\\\a_3:a_2=\dfrac{1}{3}:1=\dfrac{1}{3}\\\\a_2:a_1=1:3=\dfrac{1}{3}\\\\Answer:Yes.\ It's\ the\ geometric\ sequence.
You might be interested in
casey is six time as old as Ralph, In two years, she will be four time as old as Ralph. How old is each of them now?
Keith_Richards [23]

Casey is 18 years old and Ralph is 3 years old.

Step-by-step explanation:

Let,

Age of Casey = x

Age of Ralph = y

According to given statement;

x = 6y     Eqn 1

In two years

x+2=4(y+2)

x+2=4y+8

x = 4y+8-2

x = 4y+6     Eqn 2

Putting value of x from Eqn 1 in Eqn 2

6y=4y+6 \\6y-4y=6\\2y=6

Dividing both sides by 2

\frac{2y}{2}=\frac{6}{2}\\y=3

Putting y=3 in Eqn 1

x=6(3)\\x=18

Casey is 18 years old and Ralph is 3 years old.

Keywords: word problems, substitution method

Learn more about substitution method at:

  • brainly.com/question/12973601
  • brainly.com/question/13063819

#LearnwithBrainly

7 0
3 years ago
If there's a sale and the original price is 140 and it's one fifth off how much is the sale?
Alex777 [14]
$112
1-1/5=4/5
4/5 x 140 =112
hope this helps :)
6 0
3 years ago
A 64-ounce container of sports juice costs $6.50. A 48-ounce of the same juice costs $4.25. Which size container is the better b
Nady [450]

Answer:

Step-by-step explanation:

2

7 0
3 years ago
(2,0) (4,5) write an equation that represents the line
Yuliya22 [10]

Answer:

the equation of the line in slope-intercept form would be y=5/2x-5

Step-by-step explanation:

hope this helped!! :D

4 0
2 years ago
A taxpayer itemized and deducted an amount in a previous year and
saveliy_v [14]

This is not a form of income it is known as federal tax refund.

What is federal tax refund ?

Tax refunds are issued to taxpayers who have overpaid their taxes, or whose employers have withheld too much from their paychecks.

Therefore, A federal tax refund is not entered on a federal tax return so it is not income. Tax refunds from state governments can be itemized deductions on your federal tax return in the year they are issued.

It must be noted that If you electronically file your tax return or if you file a paper return, your refund is generally issued within 21 days.

check and know more about taxes here :

brainly.com/question/16423331

#SPJ1

5 0
1 year ago
Other questions:
  • 240-15m=200-5m <br> HELP ME
    12·2 answers
  • Which of the following statements best describes the graph of x + y = 4?
    7·2 answers
  • Determine the answer of c. X^2+16x+c
    15·1 answer
  • What is the simplified form of the expression? 5c2-4c+3D-3+2c2d-3c+d-7
    6·1 answer
  • What can be concluded if angle 1 =angle7
    7·1 answer
  • Heights of adult males are normally distrubed. If a large sample of heights of adult males is randomly selected and the heights
    10·1 answer
  • What is 1/14 x 28 in simplest form
    10·2 answers
  • 1. Clare has a recipe for yellow cake. She uses 9 1/3 cups of flour to make 4 cakes, Noah
    15·1 answer
  • What do you think I should do to find the y value?
    8·1 answer
  • Hey guys can u help me on this one, I quite don’t get it
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!