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2 years ago

Help nedeeeddddddddd

Mathematics

2 answers:

tangare [24]2 years ago

6 0

I'm grade 6 I don't know ................

zvonat [6]2 years ago

4 0

Answer:

3x+5

Step-by-step explanation:

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Indefinite integral need help pleaseeeeeee

tatiyna

Integrate indefinite integral:
$I=\int\frac{dx}{e^{2x}+3e^x+2}dx$

Solution:
1. use substitution $u=e^x$
=>
$du=e^xdx$
=>
$dx=\frac{du}{e^x}$
=>
$dx=\frac{du}{u}$
=>
$I=\int\frac{du}{u(u^2+3u+2)}du$
$=\int\frac{du}{u(u+2)(u+1)}du$
2. decompose into partial fractions
$\frac{1}{u(u+2)(u+1)}$
$=\frac{A}{u}+\frac{B}{u+2}+\frac{C}{u+1}$
where A=1/2, B=1/2, C=-1
$=\frac{1}{2u}+\frac{1}{2(u+2)}-\frac{1}{u+1}$
3. Substitute partial fractions and continue
$I=\int\frac{du}{2u}+\int\frac{du}{2(u+2)}-\int\frac{du}{u+1}$
$=\frac{log(u)}{2}+\frac{log(u+2)}{2}-log(u+1)}$
4. back-substitute u=e^x
$=\frac{log(e^x)}{2}+\frac{log(e^x+2)}{2}-log(e^x+1)}$
$=\frac{x}{2}+\frac{log(e^x+2)}{2}-log(e^x+1)}$

Note: log(x) stands for natural log, and NOT log10(x)

7 0

3 years ago

Solve each problem by working backward.

OLEGan [10]

Answer: X= 4/3 I hope this helps:)

Step-by-step explanation:

(3x ). • 4= 16

divide by 4

3x = 4

divide by 3

x= 4/3

3 0

3 years ago

Read 2 more answers

What is true of the data in the Dot Plot check on that apply number of televisions per household?

Aliun [14]

Answer:

first and last

Step-by-step explanation:

Total observations:

3 + 7 + 7 + 4 + 1 = 22

There are 22 observations, so data from 22 households

Median position: (n + 1)/2

(22 + 1)/2 = 23/2 = 11.5th value

median is the average of 11th and 12th values, both are 2. So the average is also 2

Therefore, Centre is at 2

4 0

3 years ago

Which grouping can be used to represent the product of 3x9?

Molodets [167]

Wouldn't you just multiply this, which is 3x9 = 27

6 0

2 years ago

Read 2 more answers

Please help me out with this

elena-14-01-66 [18.8K]

Answer:

FG=13

Step-by-step explanation:

We can make an equation that looks like this:

EF+FG=EG

Then, we can substitute in the numbers we know:

12+FG=25

Then solve:

FG=25-12

FG=13

Hope I helped soz if I'm wrong ouo.

~Potato.

Trademark ~Potato. 2019.

3 0

3 years ago

Read 2 more answers