f(3) = 12 for a geometric sequence that is defined

recursively by the formula f(n) = 0.5 ∙ f(n – 1), where

n is an integer and n > 0.

Write the equation in explicit form.



Answers

Answer 1

Answer:

[tex]f(n) = 96 * 0.5^n[/tex]

Step-by-step explanation:

Given

[tex]f(3) = 12[/tex]

[tex]f(n) = 0.5 * f(n-1)[/tex]

Required

Write as an explicit function

When n = 3, we have:

[tex]f(3) = 12[/tex]

[tex]f(3) = 0.5 * f(3-1)[/tex]

[tex]f(3) = 0.5 * f(2)[/tex]

Substitute: [tex]f(3) = 12[/tex]

[tex]12 = 0.5 * f(2)[/tex]

Solve for f(2)

[tex]f(2) = 12/0.5[/tex]

[tex]f(2) = 24[/tex]

So, we have;

[tex]f(3) = 12[/tex]

[tex]f(2) = 24[/tex]

Since it is a geometric sequence, calculate the common ratio (r)

[tex]r = \frac{f(3)}{f(2)}[/tex]

[tex]r = \frac{12}{24}[/tex]

[tex]r = 0.5[/tex]

Calculate the first term using:

[tex]r = \frac{f(2)}{f(1)}[/tex]

Solve for f(1)

[tex]f(1) = \frac{f(2)}{r}[/tex]

[tex]f(1) = \frac{24}{0.5}[/tex]

[tex]f(1) = 48[/tex]

The explicit function is then calculated as:

[tex]f(n) = f(1) * r^{n-1[/tex] ----nth term of a gp

[tex]f(n) = 48 * 0.5^{n-1[/tex]

Split the exponent

[tex]f(n) = 48 * \frac{0.5^n}{0.5^1}[/tex]

[tex]f(n) = 48 * \frac{0.5^n}{0.5}[/tex]

[tex]f(n) = 96 * 0.5^n[/tex]


Related Questions

A student is evaluating the expression below for n=3.7.12.8+6(n-0.5) in what order should the student do the steps?

Answers

Answer:

32

Step-by-step explanation:

The given expression is :

12.8+6(n-0.5)

We need to evaluate the expression for n = 3.7

Put n = 3.7 in the above expression.

12.8+6(3.7-0.5)

= 12.8+6(3.2)

= 12.8 + 19.2

= 32

So, the value of the given expression is equal to 32.

Which ordered pair is a solution to the system of equations below?
y = -2x – 1
y = 3x – 26

Answers

C. (5, -11) hope this helps and I’m like sure sure it’s right

A flower shop sells two types of Iris flowers: versicolor and virginica. Often, people who buy the flowers want to know about the
petal length. The summary statistics are shown in the table.
Flower Petal Length (in mm)
Versicolor Virginica
Min
45
30
Q1
51
40
44
Median
Q3
55.5
59
47
Max
69
56
If customers want to buy the flower that has the greatest variety of petal length, which Iris should they buy?
O A. versicolor, because the minimum is greater
OB. versicolor, because the maximum is greater
OC versicolor, because the difference between the minimum and Q1 is greater
O D. virginica, because the range is greater
O E virginica, because the difference between Q3 and the maximum is greater
Hi

Answers

Answer:Hey I go to ohva the answer is c

Step-by-step explanation:I took the test

The option (C) versi-colour, because the difference between the minimum and Q1 is greater, is the correct choice.

What is the median?

A median is a middle number in a series of numbers that have been arranged to lift, and it might be more informative of the set of data than the average. When there are extremes in the sequences that might affect the average of the numbers, the median is sometimes employed instead of the mean.

We have:

A flower shop sells two types of Iris flowers: first flower and second flower.

The data is shown in the picture.

As we know, the median is the mid-value.

The min value for the first flower = 45

The min value for the second flower = 30

Q1 value for first flower = 51

Q1 value for second flower = 40

Difference between min and Q1 for first flower = 6

Difference between min and Q1 for second flower = 10

6 < 10

Thus, the option (C) versi-color, because the difference between the minimum and Q1 is greater, is the correct choice.

Learn more about the median here:

brainly.com/question/21396105

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yo i need help on my exit ticket please i don’t need no links i just need the answer pleaseeeee

Answers

Answer:

B

Step-by-step explanation:

V=[tex]\pi r^{2} h[/tex]

V=3.14*[tex](16/2)^{2}[/tex]*3

V=3.14*[tex]8^{2}[/tex]*3

V=3.14* 64*3

V=602.88 which rounds up to 602.9

Suppose your SAT score is 1180. You look up the average SAT scores for

students admitted to your preferred colleges and find the list of scores below.

Based on your SAT score of 1180, which average score below represents the

college that would be your best option?

Answers

Do you have the options for this?

Se tienen cuatro libros de Matemáticas, tres Biología y tres Religión ¿De cuántas maneras diferentes se pueden ordenar todos los libros en línea recta?

Answers

Answer:

4,200

Step-by-step explanation:

Tenemos un total de:

4 libros de matemáticas

3 libros de biología

3 libros de religión

10 libros en total.

Ahora vamos a contar la cantidad de opciones que tenemos para cada posicion.

Primer libro (tenemos 10 opciones)

segundo libro (tenemos 9 opciones, porque ya colocamos un libro)

tercer libro (tenemos 8 opciones, porque ya colocamos dos libros)

Con esto ya podemos estimar el número de opciones para cada posicion, y sabemos que el número total de combinaciones es igual al producto entre los números de opciones para cada caso. El número total de combinaciones es:

C = 10*9*8*7*6*5*4*3*2*1 = 10!

Ahora si asumimos que no podemos diferenciar los libros de matemáticas, entonces no debemos contar sus permutaciones (si tenemos 4 libros de matemáticas, tenemos 4*3*2*1 permutaciones = 4! permutaciones). Debemos dividir al numero total de combinaciones por 4!.

Y lo mismo pasa para las 3! permutaciones de los libros de biología y las 3! permutaciones de los libros de religión.

Entonces el número total de combinaciones diferentes es:

[tex]C = \frac{10!}{3!*4!*3!} = \frac{10*9*8*7*6*5*4*3*2*1}{(3*2*1)*(4*3*2*1)*(3*2*1)} = 4,200[/tex]

Hay 4200 diferentes formas de ordenar los libros.

A gaming PC valued at $2500 depreciates at a rate of 12.5% per year.

Write a function that models the value of the computer over time.

Find the value of the PC after 3 year.

Answers

Answer:

v=2500-312.5x, after 3 years its worth 1562.5$

Step-by-step explanation:

Special right triangles how do you solve them

Answers

The interior angles of any triangle must add up to 180° in measure. Right angles have measure 90°, so the missing angles in both triangles here have measure 45°.

In a 45°-45°-90° triangle, the legs and hypotenuse occur in a ratio of 1 : √2. This means

(1) x = 48 √2

(2) 88 = √2 x   →   x = 88 / √2 = 44 √2

You could also set up trigonometric equations to solve for x in each case:

(1) cos(45°) = 48 / x   →   x = 48 / cos(45°) = 48 / (1 / √2) = 48 √2

(2) cos(45°) = x / 88   →   x = 88 cos(45°) = 88 (1 / √2) = 44 √2

Step-by-step explanation:

The interior angles of any triangle must add up to 180° in measure. Right angles have measure 90°, so the missing angles in both triangles here have measure 45°.

In a 45°-45°-90° triangle, the legs and hypotenuse occur in a ratio of 1 : √2. This means

(1) x = 48 √2

(2) 88 = √2 x   →   x = 88 / √2 = 44 √2

You could also set up trigonometric equations to solve for x in each case:

(1) cos(45°) = 48 / x   →   x = 48 / cos(45°) = 48 / (1 / √2) = 48 √2

(2) cos(45°) = x / 88   →   x = 88 cos(45°) = 88 (1 / √2) = 44 √2

I really need help if for a test plz help

What is the selling price of a $610 couch with a 35% markup?

Answers

171.248 Answer:

Step-by-step explanation:

You need to divide 600 by .35

Answer is

Please show how you got the answer.​

Answers

Answer:

cosA = 8/17

Step-by-step explanation:

cos =  adjacent/hypotenuse

The number that is adjacent to angle A is 24 and the hypotenuse is 51

Plug the numbers into the cosine equation, which would look like:

Cos A = 24/51

You can simplify the fraction by dividing it by 3

So Cos A = 8/17 or 0.89130173...

The first person that answered is correct

Express as a trinomial.
(2x – 9)(3x +4)

Answers

Answer:

5x^2-19x-36

Step-by-step explanation:

(2x)(3x) + (2x)(4) - (9)(3x) - (9)(4)

5x^2 + 8x - 27x - 36

5x^2 - 19x - 36

Expression as a trinomial is  6x² -19x -36.

What is a quadratic function?

A polynomial function with one or more variables, where the largest exponent of the variable is two, is referred to as a quadratic function. In other terms, a "polynomial function of degree 2" is a quadratic function.

Given:

An expression,

(2x – 9)(3x +4).

To express as a trinomial:

(2x – 9)(3x +4),

= 6x² -27x + 8x -36

= 6x² -19x -36

Trinomial is a quadratic function.

Therefore, as a trinomial is 6x² -19x -36.

To learn more about the quadratic function;

https://brainly.com/question/11485644

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I need with this and please show workkk

Answers

Answer:

1. ∠1 = 120°

2. ∠2 = 60°

3. ∠3 = 60°

4. ∠4 = 60°

5. ∠5 = 75°

6. ∠6 = 45°

Step-by-step explanation:

From the diagram, we have;

1. ∠1 and the 120° angle are corresponding angles

Corresponding angles are equal, therefore;

∠1 = 120°

2. ∠2 and the 120° angle are angles on a straight line, therefore they are supplementary angles such that we have;

∠2 + 120° = 180°

∠2 = 180° - 120° = 60°

∠2 = 60°

3. Angle ∠3 and ∠2 are vertically opposite angles

Vertically opposite angles are equal, therefore, we get;

∠3 = ∠2 = 60°

∠3 = 60°

4. Angle ∠1 and angle ∠4 an=re supplementary angles, therefore, we get;

∠1 + ∠4 = 180°

∠4 = 180° - ∠1

We have, ∠1 = 120°

∴ ∠4 = 180° - 120° = 60°

∠4 = 60°

5. let the 'x' and 'y' represent the two angles opposite angles to ∠5 and ∠6

Given that the two angles opposite angles to ∠5 and ∠6 are equal, we have;

x = y

The two angles opposite angles to ∠5 and ∠6 and the given right angle are same side interior angles and are therefore supplementary angles

∴ x + y + 90° = 180°

From x = y, we get;

y + y + 90° = 180°

2·y = 180° - 90° = 90°

y = 90°/2 = 45°

y = 45°

Therefore, we have;

∠4 + ∠5 + y = 180° (Angle sum property of a triangle)

∴ ∠5 = 180 - ∠4 - y

∠5 = 180° - 60° - 45° = 75°

∠5 = 75°

6. ∠6 and y are alternate angles, therefore;

∠6 = y = 45°

∠6 = 45°.

identify the slope in the equation of the line graphed on the coordinate plane

(easy question, easy points)​

Answers

Answer:

The slope is 0.

Step-by-step explanation:

Answer:

0

Step-by-step explanation:

The sequence 18, 9, 9/2, 9/4, 9/8, ... represents the percentage of votes a particular political candidate has according to polls each day after a scandal. The sequence has a common

Answers

Answer:

r = 1/2

Step-by-step explanation:

Given sequence:

18, 9, 9/2, 9/4, 9/8, ...

We can see this is a GP and its common ratio is:

r = 9/8 ÷ 9/4 = 9/4 ÷ 9/2 = 9/2 ÷ 9 = 9 ÷ 18 = 1/2

Common ratio

9/18=1/29/2/9=1/29/4/9/2=1/2

Common ratio is 1/2

30 is what percent of 40?

Answers

Answer:

it is 75% sheeeesh. jdjdjd

Step-by-step explanation:

3/4

Answer:

75%

Step-by-step explanation:

Let the answer be 'x'

40 × x/100 =30

40x/100 = 30

40x= 3000

x =3000÷40

x= 75

thus 30 is 75% of 40

g/cm
6 cm
6 cm
What is the volume of a square pyramid that
is 9 cm tall and has a base length of 6 cm?
cubic centimeters
Volume of a pyramid: V = {Bh (Where "B" is the area of the pyramid's base.)

Answers

Answer:

the answer should be 6 cm

Step-by-step explanation:

I believe that is it

Solve for b .
Simplify your answer as much as possible.
40=25b

Answers

8/5
I divided from both sides and flip the equation

7x+3y=11
3x-y=23
Solve by substitution

Answers

hope this helps have a nice day :)

I NEED HELP ASAP! THIS IS TIMED! WILL MARK BRAINLIEST IF ANSWER RIGHT!
What is the slope. Give answer in Decimal and Fraction.

Answers

Answer:

The slope is 15

Step-by-step explanation:

Points on the graph: (2, 30) and (4, 60)

Slope:

m = (y2-y1)/(x2-x1)

m=(60-30)/(4-2)

m=(30)/2

m= 15

I'll give you the brainiest if your answer is right.

Answers

Answer:

=54

Step-by-step explanation:

give me the brainiest

Answer:

ACD would equal 117 degrees.  ACB would equal 63 degrees.

Pat bounces a basketball 25 times in 30 seconds.At that rate, approximately how many times a will Pat bounce the ball in 150 seconds?

A. 120

B.125

C.144

D.145

Answers

Answer:

b........... ........

Answer:

B.125

Step-by-step explanation:

25:30->?:150

150/30=5

25:30x5=125:150

A stepladder has an angle of elevation of 60° with the front of the house. The length of the stepladder is 24 feet. At what height does the stepladder meet the house?

Answers

Answer:

20.78 feets

Step-by-step explanation:

Based on the solution diagram attached below :

The height at which the step ladder meets the house can be obtained thus :

Using trigonometry :

Sin θ = opposite / hypotenus

Sin θ = h / 24

Sin 60 = h / 24

0.8660254 = h/24

Height, h = 0.8660254 * 24

Height, h = 20.78 feets

What is the approximate volume of the cylinder? cylinder with height of 9 feet and radius of 4 feet.
answer choices: 324, 425.16, 734.76, 1,017,36

Answers

Answer:

Step-by-step explanation:

Formula

V = pi r^2 h

Givens

H = 9 feet

r = 4 feet

Solution

V = 3.14 * 4^2 * 9

V = 3.14 * 16 * 9

V = 452 square feet. Perhaps that 425 has a reverse digit in it. I'm sure that's the problem.

Find the slope of the line​

Answers

Answer:

1/2

Step-by-step explanation:

Pick two points on the line

I picked (0, 2) and (2, 3)

m = (3-2)/(2 -0) = 1/2

Determine the change to the base of a triangle if the height is tripled and the area is 12 times larger than the original.

I'll give brainliest to first answer. Help please

Answers

Answer:

If the height is tripled and the area is 12 times larger, the base would be 8 times larger.

Step-by-step explanation:

Area of Triangle = 1/2(base × height)

If the area is 1 foot and the height is 1 foot, that means the base is 2 feet, since 1 = 1/2(2 × 1)

Now, if the height is tripled and the area is 12 times larger, then the base would have to be 8 feet, since 12 = 1/2(8 × 3)

NEED HELP ASAP! DUE IN 3 MINUTES!!!

an electrician charges a $25 fee for a repair plus $15 per hour. Write an equation to model the total cost Y of a repair that takes X hours

Answers

The total cost Y = 25 + 15 C

ANSWER ASAP!!!!

Thank u

Answers

Answer:

27

Step-by-step explanation:

[tex]9 + 9 + 9 = 27[/tex]

3 sides

I am sorry if this is wrong

PLEASE GIVE RIGHT ANSWER Triangle EFG has coordinates E (0, 0), F (0, 2), and G (3, 0). If ΔEFG ≅ ΔXYZ, what is the measure of XY? 1.5 units 2 units 3 units 3.5 units

Answers

Answer:

2 units

Step-by-step explanation:

Congruent triangles are those triangles, which have same shape & size (same side & angle size).

If  ΔEFG ≅ ΔXYZ. And, E (0, 0), F (0, 2), and G (3, 0)

So, length EF = length XY.

Length of E (0,0) & F (0,2) is 2 units

As triangles are congruent, EF = XY

Hence, measure of XY = 2 units

Answer:

2 units

Step-by-step explanation:

Find 2 and 3 please explain how u got ur answer

Answers

1) ?=102 degrees
2) x=132 degrees
3) y=69 degrees and x=96 degrees
i hope the photo helps show you each step

La ecuación de la recta que lasa a través de los puntos P1 (2,5) y P2 (4,11) es: a) 3x+y+1=0 b)3x-y-1=0 c) 3x-y+1=0

Answers

Respuesta:

3x-y-1 = 0

Explicación paso a paso:

La forma estándar de ecuación de una línea se expresa como y = mx + b

M es la pendiente

b es la intersección con el eje y

Dada la coordenada P1 (2,5) y P2 (4,11)

Pendiente m = y2-y1 / x2-x1

m = 11-5 / 4-2

m = 6/2

m = 3

Sustituya m = 3 y (2,5) en y = mx + b

5 = 3 (2) + b

5 = 6 + b

b = 5-6

b = -1

Obtén la ecuación

y = 3x-1

Igualar a cero

y - 3x +1 = 0

Multiplicar por -1

3x-y-1 = 0

Esto da la ecuación requerida

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