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
Lady_Fox [76]
3 years ago
13

Write a recursive formula for the sequence –2, 4, –8, 16, ... please help and thank you

Mathematics
2 answers:
Alisiya [41]3 years ago
7 0

-2,4,-8,16,...

a₁ = -2

a₂ = -2a₁

a₃ = -2a₂

..................

=> aₙ₊₁ = -2•aₙ, with a₁ = -2

vaieri [72.5K]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

A recursive formula allows us to calculate any term in the sequence from the previous term.

These are the terms of a geometric sequence with r being the common ratio between consecutive terms.

r = 4 ÷ - 2 = - 8 ÷ 4 = 16 ÷ - 8 = - 2

Multiplying a particular term by - 2 gives the next term in the sequence.

Hence recursive formula is

a_{n+1} = - 2 a_{n} with a₁ = - 2

You might be interested in
Given that 3x/8 = 9y/4, Find the ratio of x:y​
mafiozo [28]

Answer:

1:6

Step-by-step explanation:

3x/8 = 9y/4

Multiply by 8

3x = 9y/4 *8

3x = 18 y

Divide by 3

x = 18y/3

x = 6y

The ratio is of x to y is

1:6

8 0
3 years ago
Read 2 more answers
What is 0.75*0.75*0.75*0.75*0.75 written as a power
laiz [17]

Oof I think it's 0.75^5 I hope it right heh :)

8 0
3 years ago
Help me with question b plz
Assoli18 [71]
The answer would be B, because since there are four quarts in a gallon, we take 1 and 1/2 and revert that back to quarts. That gives us 6. The graph clearly shows two, being B.
6 0
3 years ago
Let the polynomials A = 7x² + 3xy and B = -3xy .
bija089 [108]

Answer:

– 21x^3 y – 9x^2 y^2 e) is your answer

Step-by-step explanation:

Solve the following system for A and B:

{A = 7 x^2 + 3 x y

B = -3 x y

Express the system in matrix form:

(1 | 0

0 | 1)(A

B) = (7 x^2 + 3 x y

-3 x y)

Write the system in augmented matrix form and use Gaussian elimination:

(1 | 0 | 7 x^2 + 3 x y

0 | 1 | -3 x y)

Collect results:

Answer: {A = 7 x^2 + 3 x y  , B = -3 x y

then we multiply the results (7 x^2 + 3 x y) ( -3 x y) =  – 21x^3 y – 9x^2 y^2

7 0
3 years ago
Which of the following statements are true about the graph of f(x) = 6(x + 1)2 -9?
Sphinxa [80]

Answer:

Step-by-step explanation:

a. The vertex is (1, -9).  False.  The vertex is (-1, -9).

b. The graph opens upward.  True.  That coefficient '6' is positive.

c. The graph is obtained by shifting the graph of f(x) = 6(x + 1)2 up 9 units.  False.  It's DOWN 9 units.

d. The graph is steeper than the graph of f(x) = x^2.  True.  The given function increases 6 times faster than does x^2.

e. The graph is the same as the graph of f(x) = 6x2 + 12x - 3.

Let's put f(x) = 6(x + 1)^2 -9 into standard form.  Expanding the first term, we get f(x) = 6(x^2 + 2x + 1) - 9, or f(x) = 6x^2 + 12x + 6 - 9.  YES, TRUE

3 0
2 years ago
Other questions:
  • A prism has isosceles triangle bases with leg lengths of 5 inches,5 inches and 8 inches, and a height of 3 inches.The distance b
    9·1 answer
  • 1/5 (5b+ 15)<br> plzz help
    9·1 answer
  • 80 as a product of prime factors
    15·2 answers
  • Henrietta did an experiment. She started out with 800 bacteria cells. She found that the growth rate of the bacteria cells was 3
    14·1 answer
  • HELP ME ASAP PLEASE?!?If the pattern below follows the rule "Starting with 10, every consecutive line
    7·1 answer
  • Below are two parallel lines with a third line intersecting them.
    13·1 answer
  • M +2m + 3 for m = 12<br><br> What’s thatta
    11·2 answers
  • 11. While on vacation, Santiago wants to go snorkeling.
    10·1 answer
  • Which statements are true about points A, B, and C? check all that apply.​
    14·1 answer
  • Please solve! (best bet is to use paper)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!