given 1<x<3., Find the value of \(A=\frac{\left|x-3\right|}{x-3}-\frac{\left|x-1\right|}{1-x} +\left|x-1\right|+\left|3-x\right|\)
Answer:A=...........
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1. I fell asleep as the film was so boring. SUCH
→ It was such a boring film that I fell asleep
2. It is pointless to have that old typewriter repaired. WORTH
→ It is ..not worth having that old typewriter repaired.
3.Our driving laws and theirs are not the same. DIFFERENT
Our driving laws...are different from theirs...
4. Couldn't you take a bus to the railway station? POSSIBLE
Wasn't it possible for you to take a bus to the railway station?
5. First of all, the director explained the reason for the meeting. BEGAN
→ The director began with an explanation of the reason for the meeting
1. That play really affected me. (IMPRESSION)
à That play really __made an impression on____________________________________ me
2. This is the most amusing novel I’ve ever read. (AMUSING)
à I’ve never read a____more amusing novel than this__________________________________ one before.
3. Dad decided to pay a mechanic to look at the car when he couldn’t find the problem. (LOOKED)
à Dad decided to______have the car looked at________________________________ by a mechanic when he couldn’t find the problem.
4. I’ve arranged a trip around Europe next year. (ARRANGEMENTS)
à I’ve _____made an arrangements_________________________ on a trip around Europe next year.
5. I’m sure the audience will go wild when you come on stage. (BOUND)
à The audience ___is nound to go___________________________________ wild when you come on stage.
1. he insisted on..........a receip for the bill he had repaid
a.to be given b.being given c.giving d.given
This is the first time someone has challenged his authority.
They spent the whole week sunbathing.
The last Olympic Games took place in Seoul.
That was the safest spot...
No matter how hard he had trained,...
Why aren't people being informed about this problem by the government?
The only thing I interested in is why you did it.
I regret not looking for the hotel room before I booked it.
Fifty years ago, people would walk more than they do now.
The director began to explain the reason before the meeting.
1. I think he is able to drive very carefully.
2. We haven't spoken to each other for a long time.
3. Lien is interested in Physic at school.
4. The teacher gave us instruction very carefully.
5. I think you should go to a pagoda.
1. I think he can drive very carefully. ABLE
-> I think he is able to drive very carefully.
2. It’s a long time since our last conversation. SPOKEN
-> We haven’t spoken for a long time.
3. Lien’s favorite subject at school is Physics. INTERESTED
-> Lien is interested in Physics at school.
4. The teacher gave us very careful instruction. INSTRUCTED
-> The teacher instructed us very carefully.
5. It would be a good idea for you to go to a pagoda. SHOULD
-> I think you should go to a pagoda.
1. How many times a week do you go to your painting club?
-> How often do your go to your painting club? (OFTEN)
2. It is essential that you do your homework before going to school.
-> You must do your homewwork before going to school. (MUST)
3. Nobody is older than my grandmother in my family.
-> My grandmother is the oldest people in my family. (OLDEST)
4. I advise you not to eat lots of sweets.
-> You shouldn't eat a lot of sweets. (SHOULD)
5. It’s unlikely that we’ll do the shopping next week.
-> We might go to the shopping next week.
Lời giải:
Vì \(1< x< 3\Rightarrow \left\{\begin{matrix} |x-3|=|3-x|=3-x\\ |x-1|=x-1\end{matrix}\right.\). Khi đó:
\(A=\frac{|x-3|}{x-3}-\frac{|x-1|}{1-x}+|x-1|+|3-x|\)
\(=\frac{3-x}{x-3}-\frac{x-1}{1-x}+x-1+3-x\)
\(=-1-(-1)+2=2\)
Vậy giá trị của $A$ là $2$