Ask question

Ask question

All categories

denis-greek [22]

4 years ago

14

Find the recursive formula ... 3, -7, -17, -27,.......

2 answers:

tamaranim1 [39]4 years ago

6 0

First you have to know that each number is by adding by 10 so to start your formula it will be f(n)=f(n-1)+10
N will be the first number(3)
so it would be f(3)=f(3-1)+10

I not full 100% if i explain it right but here's a link as well
https://learnzillion.com/lesson_plans/5940-create-a-recursive-formula

svetlana [45]4 years ago

3 0

The negative sign isnt changing back and forth, so its not a geometric sequence

the difference between each term looks to be constant at 10

a1= 3
a2=-7= a1-10
a3= -17 =a2-10

oh look a pattern
an= a(n-1) - 10

You might be interested in

Jacob and his sister, jenny, share the job of cutting the grass in their yard. jacob cuts 2 of the yard, and jenny cuts the rest

Shkiper50 [21]

Answer:

okay

Step-by-step

no of yards they cut in an hour

Jacob = 2 yard

jenny 3/4 of a yard

no of yards it will take jenny to cut 3 yards = 4 hours

3 0

2 years ago

How many ways are there to choose eight coins from a piggy bank containing 100 identical pennies and 80 identical nickels?

Ahat [919]

I think it's two but I'm not sure don't count on it.

3 0

3 years ago

Write -0.35 as a mixed number in simplest form

Kipish [7]

Step-by-step explanation:

$\huge - 0.35 = - \frac{35}{100} = - \frac{7}{20}$

3 0

3 years ago

Henry eats 1/3 of a loaf of bread in 2 days. How many loaves of bread will he eat in 12 days?

bekas [8.4K]

Set up a proportion...

<u>(1/3)</u> = <u>x</u>

<u /> 2 12

Cross multiply to get 2x = 4. So x = 2 loaves of bread.

6 0

3 years ago

Read 2 more answers

A square steel bar has a length of 7.4 ft and a 2.9 in by 2.9 in cross section and is subjected to axial tension. The final leng

svetlana [45]

Answer:

Poission Ratio = 0.2784

Step-by-step explanation:

we know that

Poission ratio is defined as

μ = $\frac{-lateral strain}{longitudinal strain}$

We also know that lateral strain = $\frac{Final width-Initial width}{Initial Width}$

In our case

Final width = 2.89945 in

Initial width = 2.9 in (Area of cross section (width x depth) = 2.9 in x 2.9 in)

Thus lateral strain = $\frac{2.89945-2.9}{2.9}$

Lateral strain = $-1.8965X10^{-4}$

Similarly longitudinal strain = $\frac{Final Length-Initial Length}{Initial Length}$

Thus longitudinal strain = $\frac{7.40504ft-7.4ft}{7.4ft}$

Longitudinal strain = $6.8108X10^{-4}$

Thus by formula poission ratio = $\frac{-(-1.8965X10^{-4}}{6.8108X10^{-4}}$

Poission Ratio = 0.2784

3 0

4 years ago