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
. If y varies directly with x, and y = -35 and x=7, what is x when y = -85?
sertanlavr [38]

Answer:

x = 17

Step-by-step explanation:

Direct variation is given by

y = kx  where k is the constant of variation

-35 = k*7

-35/7 = k

-5 = k

y = -5x

We know y = -85

-85 = -5x

Divide each side by -5

-85/-5 = x

17 =x

3 0
3 years ago
PLEASE HELP! WIL GIVE BRAINLLIEST!
yarga [219]

Answer:

First Graph is Correct

Step-by-step explanation:

We are given the inequality:

n \leq 46

This means any number EQUAL TO or LESS than 46

Since, we have "equal to", there should be a "closed" circle on 46 (it means 46 is included).

LESS THAN means all numbers to the "LEFT".

Looking at the 4 number lines, we can eliminate last 2 choices since they don't have closed circles.

As for the first two choices, the first choice is correct because it shows us all the numbers left of 46 and 46 included (signified by the closed circle).

So, the first number line is the solution

4 0
3 years ago
What type of triangle is this?
Luba_88 [7]
Acute and right i think
7 0
3 years ago
Read 2 more answers
(HELP ME!!!!!!!!!!!!)
Kobotan [32]

The car is driving at 70 miles per hour which is above the speed limit on the highway

<h3 /><h3>Linear equation</h3>

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the slope of the line and m is the y intercept.

Let y represent the distance in miles and x represent the time in hours. Hence:

  • Using the points (0, 0) and (3, 200)

Slope = \frac{y_2-y_1}{x_2-x_1} =\frac{200-0}{3-0} =66.7

Bob speed limit is 66.7 miles per hour

Given a car by y = 70x. The car is driving at 70 miles per hour which is above the speed limit on the highway

Find out more on linear equation at: brainly.com/question/14323743

5 0
2 years ago
PLSSS HELPP!!! WILL MARK BRAINLIEST PLSSS
qwelly [4]

Answer:
28.26

Step-by-step explanation:

Don't lie please give brainliest

3 0
2 years ago
Other questions:
  • The sum of two numbers is 30. the difference of the two number is 4. what number is lesser
    7·1 answer
  • 22) Which coordinate pair fits the set of coordinates {(0, 4), (-2, 1), (-4, -2)} defined by a linear function? A) (5, 12) B) (6
    11·2 answers
  • The weight P in pounds that a beam can safely carry is inversely proportional to the distance D in feet between the supports of
    5·1 answer
  • Hi, umm pls help<br><br> 1/6(x-5)=1/2(x+6), solve for x <br><br> And can you please explain
    11·1 answer
  • −x=5<br> x =<br><br><br><br> wut is thi$
    8·1 answer
  • Answer to this please ?
    7·1 answer
  • Simplify:
    11·2 answers
  • Find the radius of each circle. use 3.14for the value of Pie. round your answer to
    5·1 answer
  • Express 593 million in scientific notation
    12·1 answer
  • Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!