Cho tam giác ABC thỏa$\left\{\begin{array}{l}{b}^3+c^3-a^3=a^2\\ a=2b\cos C\end{array}\right.$ Chứng minh tam giác ABC là tam giác đều.

y=$\frac{(x+m)}{(x+1)}$ có m thỏa mãn min(y)+max(y)=16/3 trên đoạn 1;2

Children can learn a lot from doing household chores. Doing chores helps children learn about what they need to do to care for themselves, a house and a family. They learn skills that they can use in the adult lives, like preparing meals, cleaning, organising and keeping a garden. Being involved in chores also gives children experience of relationship skills, like communicating clearly, co-operating and working as a team. When children contribute to family life, it helps them feel competent and responsible. Even if they dont enjoy the chore, when they keep going they get the feeling of satisfaction that comes with finishing a task. Sharing housework can also help families work better and reduce family stress. When children help out, chores get done more quickly, and parents have less to do. This frees up time for the family to do fun things together. In order to get children involved in chores, it is best to start by choosing chores that works for childrens ages and abilities. Chores that are too hard can be frustrating, and chores that are too easy might be boring. If children are old enough, we can have a family discussion about chores. This can reinforce the idea that the whole family contributes to how the household runs.

1. Which of the following is NOT true according to the passage?

A. Giving children chores can help reduce the workload for parents.

B. Teenagers often do chores so they can gain life experience.

C. 3-year-old children can help parents with some simple chores.

D. Parents should ask children to do chores that are suitable for their ages.

2. The word valued in paragraph 1 is closest in meaning to .

A. appreciated B. costly C. great D. expensive

3. Which of the following can be inferred from the passage?

A. Parents shouldnt pay their kids for chores.

B. When parents work, children have to do the household chores.

C. Parents should ask their children to share the housework when they are young.

D. Only teenagers can babysit their brothers and sisters.

4. Sharing housework helps reduce family stress by .

A. teaching kids how to communicate clearly

B. helping children to grow up

C. allowing children to work in teams

D. giving family members more free time to spend together

5. What is the main idea of the first paragraph?

A. Children can learn many skills by doing housework.

B. Parents should teach children to do housework.

C. There are many advantages of children sharing housework.

D. There are lots of household chores that children can do

Cho những câu ca dao, tục ngữ về sự lắng nghe ?

Tìm x : 3(x+4)-x²-8x-16=0