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2 years ago

URGENT O_O Find the roots of the polynomial equation! 2x^3+2x^2-19x+20=0

Mathematics

1 answer:

ohaa [14]2 years ago

4 0

The function is

y=2x^3+2x^2-19x+20

Graph attached

There is one real zero only

That's-1.047

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Please answer soon I need this answer very quickly for math. Thank you!

Kazeer [188]

a. First five terms: 9,13,17,21,25

b. Sum of first 25 terms = 1425

c. The given sequence is an arithmetic sequence because the common difference between two consecutive terms is same.

Further explanation:

Given

Formula of sequence

$a_n=4n+5$

1. First 5 terms:

For first 5 terms, we have to put n=1,2,...5,

So,

$For\ n=1\\a_1=4(1)+5\\=4+5\\=9\\For\ n=2\\a_2=4(2)+5\\=8+5\\=13\\For n=3\\a_3=4(3)+5\\=12+5\\=17\\For\ n=4\\a_4= 4(4)+5\\=16+5\\=21\\For\ n=5\\a_5=4(5)+5\\=20+5\\=25\\First\ 5\ terms\ are: 9,13,17,21,25$

2. Sum of first 25 terms:

For that we have to find 25th term first

$a_{25} = 4(25)+5\\=100+5\\=105$

The formula for sum is:

$S_n=\frac{n}{2}(a_1+a_n)}\\Putting\ the\ values\\S_n=\frac{25}{2}(9+105)\\=12.5(114)\\=1425$

3. Type of sequence

The given sequence is an arithmetic sequence because the common difference between two consecutive terms is same.

i.e.

$d=4$

Keywords: Arithmetic sequence, Sum of arithmetic sequence

Learn more about arithmetic sequence at:

#LearnwithBrainly

4 0

3 years ago

Given right triangle MUD such that mD = 23.1 and d = 38, which of the following statements are true? Round to the nearest hundre

Zigmanuir [339]

∠M=90°-23.1°=66.9° - it's a right answer.

u=d/sin∠D=97.25
m=cos∠D*u=89.52

4 0

2 years ago

Read 2 more answers

-4x+2y=0 10x+3y=8 HELPPPPPPP

tatiyna

Answer:

x=1/2 y =1

Step-by-step explanation:

(-4x+2y)/2x5=0/2x5

10x+3y=8

(-2x+y)x5=0

10x+3y=8

-10x+5y=0

10x+3y=8

8y=8

y=1

x=1/2

5 0

2 years ago

Bird seed is four dollars a bag of you buy two bags how much change will you get from ten dollar

Paraphin [41]

Answer:

Step-by-step explanation:

2 $4 bags = $8

$10 - $8 = $2 change

4 0

3 years ago

Prii needs to run at least 30

frozen [14]

30 - 18 = 12
So he has 12 miles left for this week.
There are 3 more days
So 12 divided by 3
Which is 4, so he needs 3 more hours per day for the remaining 3 days

7 0

2 years ago