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
Olenka [21]
3 years ago
7

SEQUENCES AND SERIES

Mathematics
1 answer:
Romashka [77]3 years ago
5 0

Answer:

Step-by-step explanation:

As we Know that formula for arithmetic sequence is

a_n=a_1+(d-1)

and for geometric sequence is

a_n=a1*r^(n-1)

So,

According to given conditions

     a+7d=a*r^5                              (i)\\ a+19d=a*r^7                           (ii)

By dividing equation (i) and (ii)

Hence proved that

r^2=a+19d/a+7d

You might be interested in
Caroline took a math test and got 15 out of 25 correct. What was the percent of questions she got
svet-max [94.6K]

Answer:

60 %

Step-by-step explanation:

15/25 = 60/100 = 60 %

Hope that helps!

5 0
3 years ago
Read 2 more answers
Find the holes<br> <img src="https://tex.z-dn.net/?f=f%28x%29%3D%5Cfrac%7Bx%2B3%7D%7B%28x%2B1%29%28x-2%29%7D" id="TexFormula1" t
olga55 [171]

Answer:

<h2>           x=-1 and x=2</h2>

Step-by-step explanation:

The "holes" are the x-es where function doesn't exist.

one must not divide by 0, so given function doesn't exis if the denominator is equal 0

The product {(x+1)×(x-2)} is equal 0 if any of factors  {(x+1),(x-2)} is 0, so

x + 1 = 0    or    x - 2 = 0

x = - 1      or    x = 2

8 0
2 years ago
Paul can choose to be paid $50 for a job, or he can be paid $12.50 per hour. Under what circumstances should he choose the hourl
nalin [4]
If the work is longer 4 hours than he would earn more money with the hourly wage
7 0
3 years ago
Read 2 more answers
Which shows the expressions in the order they would appear on a number line from least to greatest?
Ganezh [65]
2^3 = 8
11/9 = 1.22
sqrt 5 = 2.24
sqrt 20 = 4.47
sqrt 11 = 3.32

least to greatest : 11/9, sqrt 5 , sqrt 11 , sqrt 20, 2^3
7 0
3 years ago
Your bank account balance is $32.00. You make the following withdrawals, in the following order: $15.00, $7.41, $35.79, and $0.5
aksik [14]

Answer:

−58.73

Step-by-step explanation:

32−(15.53+7.41+35.79+32)

=−58.73

3 0
3 years ago
Other questions:
  • A waterwheel has a radius of 4 feet, and the center of the wheel is 1 foot under the waterline. You notice a yellow mark
    6·2 answers
  • a vehicle travels 24km with a constant speed of 65 km/h and another 50 km with a constant speed of 80 km/h what was its average
    8·1 answer
  • Answer ASAP, will give brainliest!!
    12·1 answer
  • (25 POINTS) *2 questions*
    10·2 answers
  • Which ordered pair is a solution of the equation? − 3 x + 4 y = 1 4 −3x+4y=14 Choose 1 answer:
    7·1 answer
  • Find an equation for the perpendicular bisector of the line segment whose endpoints are (2,-9) and (-6,7).
    10·1 answer
  • Mark wants to paint a mural. He has 1 1/4
    12·2 answers
  • 11,880 yd = How many Miles?
    9·2 answers
  • Find an equation in slope-intercept form of the line that has slope –2 and passes through point (1,9)
    14·1 answer
  • Please solve with explanation
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!