![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How much is the length and width of a rectangular vegetable field? Solve the equation
Mathematics Grade 6 Volume 2 evaluation manual page 51 question 1
1、 2.3, 5050, 0.188, 235, 2.8% 6, 60, 75, 12, 0.75
I've changed it. Absolutely right
Dy / DX = (e ^ x + x) (1 + y ^ 2) general solution
dy/dx=(e^x+x)(1+y^2),
dy/(1+y^2)=(e^x+x)dx,
arctany=e^x+x^2/2+C
The general solution is y = Tan (e ^ x + x ^ 2 / 2 + C)
A large square is made of small rectangular wood blocks with a length of 24cm and a width of 16cm. What is the minimum side length of the large square? How many small rectangular pieces of wood do you want at least?
The spelling is as follows: 24 × 2 = 16 × 3 = 48 (CM); 2 × 3 = 6 (pieces); answer: the minimum side length of a large square is 48CM; at least 6 small rectangular wooden blocks are required
There are eight painted pillars in the children's palace, which share 37.68 kg of paint. It is known that the diameter of the bottom surface of the pillars is 5 decimeters, so the height of the pillars should be calculated. (paint 0.5 thousand per square meter)
First, the area of paint should be calculated as 37.68/0.5 per square meter = 75.36 square meters, and then the circumference should be calculated as: circumference of circle = diameter * 3.14
The total height is 75.36/1.57 = 48 M. if 8 columns are removed, the height of each column is 6 m
Five 5, four operation symbols, can only be used once, add parentheses, equal to 24, urgent
（5×5－5）×5÷5 = 25
Solving a differential equation problem! (ycosxsinx) DX + (ysinx + xcosx) dy = 0
The general solution is (ysinx + xcosx SiNx) * e ^ y = C
What is the coefficient and degree of the cube of minus 7 / 8ab square C
The coefficient of the cube of the square C of minus 7:8ab is minus 7:8 and the degree is 5
How many math problems, 9 × 8 =?
6×5＝,6×5＝,2×8＝,3×5＝,
9X8=72
6X5=30
2X8=16
3X5=15
Lou Lou has two questions that are the same, so only give four answers. If you want more, please reply me
Please accept~
It is known that Y-1 is a positive proportional function of X, and when x = - 2, y = 4
1. Write the functional relationship between Y and X, and draw the image
If the point (a, - 2) is on the image of this function, find the value of A
3 if the point m (m, Y1) and (M + A, Y2) on the image of this function, compare the size of Y1 and Y2!
(1) Because: Y-1 is a positive proportional function of X, and when x = - 2, y = 4. So: let Y-1 = KX, substitute the condition all the time, and get: 4-1 = - 2K, and the solution is: k = - 3 / 2. So: the analytic expression of the function is y = (- 3 / 2) x + 1 (2) if the point (a, - 2) is on the function, then: - 2 = (- 3 / 2) a + 1, and the solution is: a = 2 (3) if (m, Y1) and (M + 4, Y2)
RELATED INFORMATIONS
- 1. A cylindrical reservoir with a bottom radius of 10 meters can store 1256 cubic meters of water. If the depth of the reservoir is 1.5 meters, how much can it store?
- 2. Sequence 2, - 11101, - 100110001 A general formula of is?
- 3. Find ∫ ∫ [1 / (x ^ 2 + y ^ 2 + 1)] dxdydz, where D is a closed region bounded by cone x ^ 2 + y ^ 2 = Z ^ 2 and plane z = 1
- 4. How do four fives equal seven
- 5. Given that ab ≠ 0, the sufficient and necessary condition for a + B = 1 is A3 + B3 + ab-a2-b2 = 0
- 6. Fairy tale composition
- 7. (it's better to understand. X is the death of Ike and X is the multiply sign) judge 1. 16x = 0 is the equation () 2. The number 5 less than x is 10, and X is 10 () 3. When x is reduced by 25%, it is equal to 3 / 4 of 300. X is 300 () 4. When solving the equation 3x + 5 / 4 × 2 = 13 / 3, we should first consider 3x as an additive () 5. A car travels an average of M kilometers per hour, a bicycle travels an average of N kilometers per hour (n < m), and the distance difference is 4 (m-n) kilometers () solve equations x+48=72 2x-5=25 0.15x=0.9 9÷5x=12 4x+36=56 10=31-3x 1.7×(12-x)=5.1 (135 + 49) △ x = 23.4% 1 (x + 0.25) = 45% Practical questions 1. The school chorus has 124 people, 19 more than three times the number of science and technology groups. How many people are there in the school science and technology groups? 2. After 2.5 hours of driving on a 360 km long road, there are 210 km left. How many kilometers does the car travel per hour?
- 8. The known set a = {x | x > 15, or X
- 9. As shown in the figure, the circumscribed circle diameter ab of △ ADC intersects CD at point e. it is known that ∠ C = 65 ° and ∠ d = 47 ° and the degree of ∠ CEB is calculated
- 10. In space rectangular coordinate system, equation 3x-4y-12z-14 = 0 represents plane, P (0,0,1) represents point By analogy with the formula of the distance from the midpoint to the straight line in the plane rectangular coordinate system, we can get that the distance from the point P to the plane is
- 11. Let b > a > 0 be a constant and f (x) = 2x-x ^ 2. It is known that when x belongs to [a, b] and the range of F (x) is [1 / B, 1 / a], the values of a and B can be obtained
- 12. a> 0, b > 0, C | B | > | a |, is to compare the size of ABC, a + B, a + C, B + C Compare the size of a, B, C, a + B, a + C, B + C
- 13. A rectangular playground, its perimeter is 250 meters, length and width ratio is 3:2, the playground area is how many square meters?
- 14. A number must be bigger than its reciprocal
- 15. 9801 * 99 simple calculation, recursive equation
- 16. Several super simple fraction problems (as long as the formula) 1. A grain store buys 80 tons of rice, the flour is one fifth less than rice, how many tons of flour? 2. A grain store buys 64 tons of flour, the flour is one fifth less than rice, how many tons of rice? 3. A grain store buys 16 tons less than rice, the flour is one fifth less than rice, how many tons of rice?
- 17. What is the root of equation (x 5) (2x-1) = 0?
- 18. Given that one root of the equation x minus 2x minus C = 0 is 3, then the other root is 3
- 19. Y = Log1 / 2 (SiNx cosx)
- 20. If the corresponding point of complex z = m-2i / 1 + 2I on the complex plane is in the third quadrant, then M is in the range of value