Given that the inequality 4x-3a is less than or equal to 0, the positive entire solution is 1,2, then what is the value range of a

Given that the inequality 4x-3a is less than or equal to 0, the positive entire solution is 1,2, then what is the value range of a

4x-3a≤0
x≤3a/4
If the positive integer solution is 1,2, then 2 ≤ 3A / 4

A right triangle, the two right sides are 3 and 4. The hypotenuse is 5. Calculate the angle between right side 3 and hypotenuse 5
How to calculate?

Let be α, then cos α = 3 / 5,
α=53°,
It's about 53 degrees, but I can't type it

The homonym of "easy" Adverb "where" and the antonym of "inside"

easily
wear
outside

High school mathematics problems (sine cosine theorem)
In the triangle ABC, a, B, C are the opposite sides of the angle A.B.C, and 2a-c / C = tanb / Tanc, find the size of the angle B

(2a-c)/c=tanB/tanC=(sinBcosC)/(cosBsinC)
sinB/sinC=b/c cosC=(a^2+b^2-c^2)/2ab cosB=(a^2+c^2-b^2)/2ac
If you take it in, (2a-c) / C = 2A / C-1 = (sinbcosc) / (cosbsinc)
2A / C = 2A ^ 2 / (a ^ 2 + C ^ 2-B ^ 2) AC = a ^ 2 + C ^ 2-B ^ 2, CoSb = (a ^ 2 + C ^ 2-B ^ 2) / AC = 1, because 0 ＜ angle B is less than 180, so ∠ B = 90 degrees

If I give you a sentence and fill in the blanks at the beginning of the sentence, how can I know whether it is the verb ing or the original form of the imperative sentence
You can give examples and analyze them according to your examples. The examples should not be too complicated

Let's take a look at part of the decision

How to understand the significance of improving people's livelihood in socialist construction

The significance of socialist construction focusing on people's livelihood
Social construction is closely linked with the vital interests of the broad masses of the people, focusing on solving the most concerned, direct and realistic interests of the people, so that the achievements of economic development can be more reflected in improving people's livelihood. It is an essential environmental guarantee for promoting the construction of socialism with Chinese characteristics, and has great and far-reaching significance for building a moderately prosperous society in an all-round way
(1) improving people's livelihood is the essential embodiment of the party's nature and purpose. The Communist Party of China is the vanguard of the Chinese working class, the Chinese people and the Chinese nation, representing the fundamental interests of the overwhelming majority of the Chinese people. Our party regards serving the people wholeheartedly as its fundamental purpose, and always insists that the interests of the people are above everything else, It is an important test of the party's ruling ability to realize, maintain and develop the people's interests. Only by constantly solving the problems of people's livelihood can we win the trust and support of the people. Only with the trust and support of the people can the party's ruling position be stable, We must put the improvement of people's livelihood in a more prominent position, always care about the people, always care about people's livelihood, truly achieve "power for the people, feelings for the people, interests for the people", implement the construction of a harmonious society on the people's survival, development and happiness, and implement the fundamental purpose of serving the people wholeheartedly into a series of specific policies to benefit the people, In order to better practice the party's fundamental purpose and consolidate the party's ruling position
(2) improving people's livelihood is an inevitable requirement for the implementation of the scientific outlook on development. The core of the scientific outlook on development is "people-oriented", which means constantly meeting the people's growing material and cultural needs, and improving the people's happiness index. The important goal of the scientific outlook on Development is "promoting people's all-round development", People's all-round development is the essential feature of socialism and communism. Only people's all-round development can provide spiritual power and intellectual support for socialism. People's all-round development needs education, health and security. "Development is for the people, development depends on the people, and the achievements of development can be shared by the people." this is one of the most brilliant statements in the report of the 17th CPC National Congress, It is also the starting point and foothold of the scientific outlook on development. This requires us to adhere to the "first important meaning" of development, at the same time, we must follow the fundamental method of "overall consideration", vigorously strengthen social construction, always take improving people's livelihood as the goal of development, and effectively solve the most concerned, direct and realistic interests of the broad masses of the people, Resolve all kinds of contradictions and conflicts of interest in reality, and constantly improve the people's material and cultural living standards
(3) improving people's livelihood is an objective need to give full play to the superiority of the socialist system. The essence of socialism is to liberate and develop the productive forces, eliminate exploitation and polarization, and finally achieve common prosperity. The essence of socialism requires that the distribution of social wealth should be fair, fair and reasonable, and that social wealth should be shared by the whole people and become rich together, This is the greatest advantage of socialism. Poverty is not socialism, which Comrade Deng Xiaoping emphasized as early as 1987. Socialism is to vigorously develop the productive forces, make the people rich and live a rich and happy life. Therefore, on the basis of liberating and developing the productive forces, we should pay close attention to the people's livelihood and improve it, All wealth created by the working people should be shared by the whole people
(4) improving people's livelihood is an important cornerstone of building a socialist harmonious society. Social harmony is the goal of our party's unremitting struggle and the common social ideal of the people of all ethnic groups in our country. The core of building a socialist harmonious society is to solve the problem of balancing and balancing interests, and to maintain social fairness and justice, It is the basic condition to promote social fairness and justice, and then to achieve a harmonious society. Throughout the history of development at home and abroad, people's livelihood will inevitably lead to turmoil; paying attention to people's livelihood will promote social development and maintain social harmony, Only in this way can all the people share the fruits of reform and opening up and achieve social stability and harmony
(5) improving people's livelihood is the realistic need of social civilization and progress. With the deepening of reform and opening up, especially due to economic and social transformation, new changes have taken place in the pattern of interests of different strata. China's livelihood issues are facing many new issues and new spears, Some people's livelihood problems with the nature of basic survival have not been completely solved. The employment problem is caused by the singleness of economic growth goal orientation. The income gap between regions, between urban and rural areas, and between different classes is widening due to the imperfect distribution system, Due to the lagging development of social undertakings and the shortage of social public goods supply, it is difficult to see a doctor, go to school and housing, and the frequent accidents of production safety and environmental pollution caused by the inadequate transformation of extensive economic growth mode. These problems urgently need to be solved as soon as possible, otherwise, it will not only affect the economic and social development, but also endanger social stability, Therefore, we must take measures to ensure and improve people's livelihood in a more prominent position

What is the meaning of complex number in mathematical set

Plural
（1） Mathematical noun. A number composed of real part and imaginary part, such as a + bi. Where a and B are real numbers, I is "imaginary unit", and the square of I is - 1. A and B are called real part and imaginary part of complex number a + bi respectively. When B = 0, a + bi = a is real number; when B ≠ 0, a + bi is also called imaginary number; when B ≠ 0, a = 0, B ≠ 0 and a = 0, a + bi is also called imaginary number, Bi is called pure imaginary number. Both real number and imaginary number are subsets of complex number. Just as real number can be expressed on the number axis, complex number can be expressed on the plane. This representation is usually called "Argan diagram method" to commemorate Swiss mathematician j.r.argand (1768-1822). Complex number x + Yi is represented by coordinate black point (x, y) If the real parts of two complex numbers are equal and the imaginary parts are opposite to each other, then the two complex numbers are called conjugate complex numbers
（2） Relative to the singular, two or more

The nature and determination of Zheng shape (except definition)

Corresponding to the definition of rectangle, Zheng shape is defined as two groups of quadrilateral whose adjacent sides are equal
The second definition of Zheng shape: a quadrilateral with one diagonal dividing vertically and the other diagonal is Zheng shape
Obviously, diamond is a special Zheng shape
The character of Zheng shape:
1. Axisymmetric, the axis of symmetry is a diagonal of Zheng shape
2. There is a group of diagonally equal. For the convenience of discussion, we might as well call this group of diagonally equal
3. Area formula of Zheng shape
S = Mn / 2, where m and N are the lengths of two diagonals
S = absin a, where a and B are opposite sides of Zheng shape, and a is equiangular of Zheng shape
S = (a ^ 2sinb + B ^ 2sinc) / 2, where B and C are a set of unequal angles of Zheng shape
4. The circumference formula of Zheng shape: C = 2 (a + b)
5. Zheng shape has inscribed circle. The center of the inscribed circle is the intersection of Zheng symmetry axis and equiangular bisector
6. The necessary and sufficient conditions for Zheng to have circumcircle are as follows
2Ab = Mn or a = 90 degrees or B + C = 180 degrees
7. The line between the inscribed circle of Zheng shape and the four tangent points of the four sides is isosceles trapezoid. The line between the inscribed circle of Zheng shape and the four intersection points of the two diagonal lines is still Zheng shape

My favorite sport

《 my favorite sport》
My favourite sport is basketball because it is an exciting game and I feel relaxed after playing it.Besides that,the real reason why I like basketball is that I like N.B.A stars and the best basketball player in the history of the game I like is Michael Jordan.As everyone knows, playing basketball is not only good for our healthy but also make people excited.In my spare time,I often play basketball with my friends in the playground near my home.We have a good time when we play basketball together.Personally ,I think it is easy to play basketball.I hope everyone love basketball, too.So we can play together.We can have a good time when playing football.

Math problem: after a 20 cm long cylinder is cut off a 5 cm long section, the surface area of the cylinder is reduced by 31.4 cubic centimeters
How many cubic centimeters is the volume of the original cylinder?

Let the bottom radius of the cylinder be r, then the volume of the cylinder is 2 * 3.14 * r * 20
The volume of the truncated part should be 2 * 3.14 * r * 5 = 31.4, so r = 1cm
So the volume of the cylinder is 2 * 3.14 * 1 * 20 = cubic cm
Or: the volume of the truncated part is 1 / 4 (5 / 20) of the original cylinder volume, so the volume is 31.4 * 4 = 125.6