The n-order derivative of y = 1 / (2-x-x ^ 2) is on-line

y=1/(2-x-x^2)
=1/3 * [1/(2-x) +1/(1+x)]
and
The n-order derivative of 1 / (2-x) is n! / (2-x) ^ (n + 1)
The n-order derivative of 1 / (x + 1) is n! * (- 1) ^ n / (x + 1) ^ (n + 1)
So we get the Nth derivative of Y
y(n)=1/3 *n!*[1/(2-x)^(n+1)+(-1)^n/(x+1)^(n+1)]

The derivative of F (x) = 1-x / ax
Which formula do you want to substitute

The algorithm of derivative of quotient: (U / V) '= (u'v-uv') / V ^ 2
f(x)=1-x/ax
f'(x)=[(1-x)'×(ax)-(1-x)×(ax)']/(ax)^2
=[-1×(ax)-(1-x)×a]/(ax)^2
=-a/(ax)^2
Glad to answer for you
If you don't understand this question, you are welcome to ask

How to find the derivative of F (x) = (1 + x) / (1-x) e ^ (- ax)?
Write in detail~

f(x)=(1+x)/(1-x)e^(-ax)
f'(x)='
For the convenience of typing, set = x1
=x2
=(x1)'(x2)+(x1）（x2)' ...（1）
'=2/(1-x)^2...（2）
'=ae^ax.（3）
Then bring (2) and (3) to (1) to solve

Synonyms of junior one English
1、Tim usually (spends) two hours doing his homework.
Replace the words in brackets with synonyms of cost
2、I can help you to learn Chinese.(help...with)

Tim’s homework usually costs him two hours．
I can help you with Chinese．
Hope to help the landlord

Change to synonym
We have black and white hats for $15
We have black and white hats _ the _ 　＿＿＿　　＄15

I'm glad to be able to answer your question here,
You should fill in:
We have black and white hats (at) the (price of)　＄15

Explain sentences in English
1.I usually take the undreground to school.

2.The tiger made the little animals die in the forest .

3.Our teacher asked Charles to reply to his question in ten minutes

4.Mr Lee got to the airport at 3.15 p.m

5.The soldier swam in the direction of the boy and helped him out of water.

Explain sentences in English.
English! Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
It's a synonym

Do you mean paraphrase?
1 i usually go to school by the underground
I often go to school by subway
2 the tiger is so strong that all little animals are driven to death.
The tiger dominates the forest and makes the small animals die
3 our teacher ask charles to answer within ten minutes.
The teacher asked Charlie to give the answer in ten minutes
It seems that the expression of this sentence is wrong, there should be no to
mr lee arrived at the airport at 3：15pm
Mr. Li arrived at the airport at 3:15 p.m
5 the soldier swam to the boy and saved him out
The soldier swam in the direction of the little boy and rescued him

Explain sentences in English
1.Everyone was cheerful at once._______ 2.Are you stone deaf? 3.Can you give me some suggestions?_ 4.I don’t feel like eating now._ 5.He was late because it rained heavily._______ 6.The children _ enjoyed_ themselves_ last night.________________ 7.Lucy is _ as_ old_ as_ Lily.______ 8.The shop provides free paper for the customers._ 9.Why not go with me?_ 10.There are more than 2,000 students in my school.________________

1、Everyone was happy
2、Do you hear nothing
3、can you advise me?
4、I have lost my appetite.
6、The children had a good time last night.
7、Lucy and Lily are the same age.
8、Customers took paper without paying

Synonyms of English conversion
They pick up languages so naturally and esily.
What is the synonym of pick up? Is learning OK? Or what is more accurate? Thank you

Learn or master

Online English synonym conversion
1.What color do you like best?_ _ _ color?
2.Can I help you?What _ _ _ _ you?
3.Tom is birthday is January 13 th.Tom is_ _ _ is January.
4.How old is Sam? _ __ of Sam?
5.Do you want to see a movie?Do you want to _ _ _ ?
The last one is wrong. It's four holes.

what's your favourite
can I do for
date of birthday
what's the age
go to the cinema

English: synonym conversion
Tom is too lazy to learn English well.
Tom is ___ lazy _ _ ___ learn English well.

"Too... To... Is often interchanged with" so that... "
So; that he can't

The n-order derivative of y = 1 / (2-x-x ^ 2) is on-line