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A dream of Red Mansions Chapter 26 synopsis + appreciation That is to say clearly the content of this chapter, and then add some critical words, the best two can be coherent
Look at the address in the reference materials. Every time I pick it, you can change it yourself. The first half of the twenty sixth chapter is about Xiaohong and Jia Yun. Xiaohong is secretly in love with Jia Yun. She goes from yihongyuan to Baochai's residence to draw flowers with a pen
What is 2.1 △ 0.56
Given that a, B ∈ R, 2a2-b2 = 1, then the minimum value of | 2a-b | is______ ．
∵ 2a2-b2 = 1, ∵ (2a-b) 2 = 4a2-4ab + B2 = 2a2-b2 + (2a2-4ab + 2B2) = 1 + 2 (a-b) 2, so when a = B, the minimum value of (2a-b) 2 is 1, so the minimum value of | 2a-b | is 1, so the answer is: 1
Power conversion problem^^
Say 2 ^ 29
Why is it equal to the 14th power of 4 multiplied by 2, equal to the 7th power of 16 multiplied by 2, equal to the 3rd power of 256 multiplied by 4
Equal to 16777216, multiply by 4 equals 67108864
How is it converted?
A ^ b * a ^ C = a ^ (B + C) (a ^ b) ^ C = a ^ (BC) SO 2 ^ 29 = 2 ^ (28 + 1) = 2 ^ 28 * 2 = 2 ^ (14 * 2) * 2 = [(2 ^ 2) ^ 14] * 2 = (4 ^ 14) * 2 = [4 ^ (7 * 2)] * 2 = [(4 ^ 2) ^ 7] * 2 = [16 ^ (2 * 3 + 1)] * 2 = [16 ^ (2 * 3)] * 16 * 2 = [(16 ^ 2) ^ 3] * 32 = (256 ^ 3) * 32 = 16777216 * 32 = 536870912 you
For a certain mass of carbon dioxide, when its volume v = 50 cubic centimeter, its density p = 1.98kg/m3, find the functional relationship between P and V
The mass of carbon dioxide is: 50x0 ^ 6m3 x 1.98kg/m3 = 9.9x0 ^ 5kg
The relationship between density and volume is p (density) = 9.9x10 ^ - 5 / v
Given that the square of a is multiplied by the square of B + the square of a + the square of B + 1 = 4AB, find the value of a and B?
The process should be clear and explain how to do it
How to analyze
Square of a times square of B + square of a + square of B + 1 = 4AB
It can be reduced to (the square of a multiplied by the square of B) - 2Ab + 1 + the square of a + the square of B - 2Ab = 0
That is, the square of (AB-1) + the square of (a-b) = 0
That is ab = 1 and A-B = 0
A = 1, B = 1 or a = - 1, B = - 1
The standard equation of parabola with the center of ellipse x ^ 2 / 169 + y ^ 2 / 144 = 1 as vertex and focus as focus is
From the ellipse x ^ 2 / 169 + y ^ 2 / 144 = 1, a = 13, B = 12,
c^2=a^2-b^2=25,c=5
Then the center of the ellipse is the origin and the intersection is (± 5,0)
In the parabola, P = 2C = 10
So the parabolic equation is y ^ 2 = ± 2px
That is, y ^ 2 = ± 20x
What are the factors that affect the compression pressure of engine cylinder?
1. The valve is not tight; 2. The piston ring is worn; 3. The cylinder is worn; 4. The piston is worn; 5. The spark plug gasket is not tight or the diesel injector gasket is not tight; 6. The cylinder gasket is broken; 7. The piston can not reach the top dead center
product rule
Please write the rules clearly
A × B = B × a multiplicative commutative law
(a × b) × C = a × (B × C) multiplicative Association Law
(a + b) × C = a × C + B × C multiplicative distribution law
Let y = f (secx), f '(x) = x, then dy / DX / x = half pie
y = f(secx),f '(x) = x
y ' = f ' (secx) * (secx) ' = secx * secx tanx = sec²x tanx
x->π/2,dy/dx -> ∞
RELATED INFORMATIONS
- 1. How many kilos is 56 tons
- 2. What is 41 ° 56 '△ 2?
- 3. A parts processing factory produces 93 cases of parts every day on average in the first six days. In order to catch up with the work, the number of parts cases produced on the seventh day is three cases more than the average of the seven days How many boxes of parts are produced on day 7?
- 4. Master Wang plans to process a batch of machine parts in six days, with an average of 93 parts per day. If he processes another day, the average number of parts per day will be 93
- 5. Fractional equation: to produce a certain kind of machine parts. It is planned to complete in 30 days. If 5 more parts are produced every day, then 10 more parts will be produced in 20 days. How many parts are originally planned to produce every day?
- 6. The first spare parts workshop processes a batch of parts. If it processes 30 parts per hour, it will be completed 10 hours ahead of schedule. If it processes 20 parts per hour, it will be 10 hours ahead of schedule Six hours ahead of schedule, how many parts are there?
- 7. A worker originally planned to produce a batch of parts in 26 days. After working for 2 days, he changed the method and produced 5 more parts every day than before. As a result, he finished his job 4 days ahead of schedule How many parts are produced every day and how many are in this batch?
- 8. A worker originally planned to process a batch of parts within a limited time. If he processes 10 parts per hour, he can overfulfil 3; if he processes 11 parts per hour, he can complete 1 hour in advance. How many parts are there in this batch? How many hours will it take to finish as planned?
- 9. Five workers process 735 parts 735 parts were processed by one worker, and 135 parts were processed in two days. It is known that one of the two workers asked for leave for two days. If no one asked for leave in the next few days, how many days would it take to complete the task? The answer is 135 ± (5 × 2-1 × 1) × 5 = 75 (735-135) ± 75 = 8 days Why use 5x2 to explain each step in detail
- 10. There are 600 parts that need to be processed in one day. When the working efficiency is p hours per person per day, Q workers are needed. If the working efficiency of each person per day is increased by 20%, how many times can the number of workers be reduced?
- 11. Dream of red mansions with high marks The more detailed the better The number of words is the best way for me to make a speech
- 12. Dream of Red Mansions 1. In a dream of Red Mansions, "who is the first person to write about? 2. The man is good at political tricks, such as poison design Get rid of one's power to force one's death to destroy one's marriage What are the three most rebellious people in a dream of Red Mansions? Name two men in Jia Fuzhong who were drunk and dreamt of death? 5. Write three of the twelve beauties in Jinling
- 13. On the exercises of a dream of Red Mansions 1. In a dream of Red Mansions, the person who "hears his voice first" refers to (), who is good at political tactics, such as poisoning (), power (), forcing death (), and destroying (), and finally comes to the tragic end of "scheming too cleverly and mistaking Qing Qing's life" 2. The three rebellious characters in a dream of Red Mansions are (), (), () 3. More than once, an ordinary and hard-working peasant woman appeared in the Grand View Garden. The one who was often teased by everyone was () Please write down five of the twelve beauties in Jinling
- 14. Simple algorithm for finding (- 2.5) + (+ 8.1) + (- 7.4 + (+ 11.3) + (- 12) + (+ 56)
- 15. Simple operation of 27 × 44 + 27 × 55 + 27
- 16. Words for children in Wenchuan earthquake Need an article for children in Wenchuan earthquake! Big brother, big sister!
- 17. A primary school donated 6800 yuan to five classes of grade six in the activity of "giving love - donating money to Wenchuan disaster area". Among them, class one donated 1500 yuan, and class two donated less than class one The donation is 200 yuan. The donation of class three is 20% of the total amount of the grade. The ratio of donation of class four to class five is 19:21?
- 18. After the earthquake in Yunnan Province, teachers and students of our school enthusiastically donated money. In the past six years, more than 160 yuan was donated by female students, accounting for 40% of the whole class, while 23 yuan was donated by male students?
- 19. Last year, Xingfu road primary school donated 6320 yuan to the Wenchuan earthquake stricken area. The sixth grade students donated 32 yuan as much as the fifth grade students. How much did the fifth grade students donate?
- 20. All the students in Grade 6 of the third primary school donated money to the earthquake stricken areas. Girls contributed more than 360 yuan for 50% of the whole year and donations, while boys contributed 2 / 3 of the girls. How much money did grade 6 donate to the earthquake stricken areas?