All categories

2 years ago

First five term for An=n^2-2n

Mathematics

1 answer:

densk [106]2 years ago

6 0

First 5 terms are: -1,0,3,8,15

Step-by-step explanation:

we will put n=1,2,3,4,5 to find first 5 terms of the sequence

Explicit formula for sequence is:

$a_n = n^2-2n$

Putting n=1

$a_1 = (1)^2-2(1)\\= 1-2\\= -1$

Putting n=2

$a_2 = (2)^2-2(2)\\= 4 - 4 \\=0$

Putting n=3

$a_3 = (3)^2-2(3)\\= 9-6\\= 3$

Putting n=4

$a_4 = (4)^2 - 2(4)\\= 16-8 \\= 8$

Putting n=5

$a_5 = (5)^2-2(5)\\= 25 - 10\\= 15$

Hence,

First 5 terms are: -1,0,3,8,15

Keywords: Arithmetic sequence, Common difference

Learn more about arithmetic sequence at:

#LearnwithBrainly

You might be interested in

Help I just not that smart

Lubov Fominskaja [6]

Answer:

$1\frac{1}{9}$ gallons of paint

Step-by-step explanation:

paint =

2/3 ---- 3/5

x ---- 1

$x = \frac{\frac{2}{3} }{\frac{3}{5} } =\frac{(2)(5)}{(3)(3)} =\frac{10}{9}$

$x=1\frac{1}{9}$

Hope this helps

4 0

1 year ago

Read 2 more answers

You are building a skateboard ramp from a piece of wood that is 3.1 meters long. You want the ramp to make and angle of 25 with

andrew11 [14]

Answer:

30 degrees.

Step-by-step explanation:

The ladder that extends from the floor to the storeroom makes a right triangle. The ramp is the hypotenuse measuring 10 m and the elevation of the storeroom is the opposite side. The angle of elevation is the arcsin of the quotient of the 5/10. Thus, the answer is 30 degrees.

Read more on Brainly.com - brainly.com/question/1411682#readmore

6 0

3 years ago

A bird leaves its nest and travels 20 miles per hour downwind for x x hours. On the return trip, the bird travels 4 miles per ho

marysya [2.9K]

a. if the return trip is the same then the bird traveled 40miles

b. the time of the trip is x hours + 6/x-4

Hope this helps!

5 0

2 years ago

Carl is balancing his checking account. After comparing the bank statement to his register, he notices an outstanding debit of $

xenn [34]

Answer:

$51.75

Hope this helps!

(Please mark brainliest!)

8 0

2 years ago

Read 2 more answers

Ermias and Jeremiah both leave the bookstore at the same time, but in opposite directions. If Jeremiah travels 8 mph faster than

leva [86]

Using proportions, it is found that Ermias is traveling at a rate of 11 mph and Jeremiah at a rate of 19 mph.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

Jeremiah travels 8 mph faster than Ermias, hence their velocities are:

x, x + 8

They travel in opposite directions, hence in one hour they are 2x + 8 apart.

In eight hours, the distance is 8(2x + 8), which is of 240 miles, hence:

8(2x +8) = 240

2x + 8 = 30

2x = 22

x = 11.

Then:

x = 11 -> Ermias.

x = 11 + 8 = 19 -> Jeremiah.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

3 0

1 year ago