Mathematical modeling questions, who can quickly give a mathematical model 100

This model is actually the maximum integer value of the side length of the small box when calculating the side length of the square of the base plate.

1.Let the side length of the small box be a*b, assuming a>b, let the length of each side be placed on the side a is n1, and the length of the side b is n2 (for each side alone), then f(n1,n2)=min(>0, when f(n1,n2) is closer to 0, the closer it is to 0, the tighter it is.

In the case of box 1, a = b = , when n1 = 2 and n2 = 2 f(n1, n2) = = the same way that box 2 is n1 = 1 n2 = 2

Box 3 is n1=1 n2=4 or n1=3, n2=12F(n1,n2)-=min(>0 can be arranged by arranging two more halves on each side so that they will not fall.

That is, the square that is seen as made.

What about the topic? What about the specific requirements?

Upload it quickly.。。。

Hi Answer:

If all the girls dig the hole, 5*10=50 let 50 30=5 3 boys go to plant trees, 50 25=2 boys go to water the trees 6-5 3-2=2 and 1 3=7 31 20:1 30:1 25=15:

10: 1215 + 10 + 12 = 377 3 divided by 37 = 7 111

7 111**15*20=700 37 is approximately equal to 1850+18=

If all the girls dig holes, 5*10=50.

Let 50 30 = 5 3 boys plant a tree, 50 25 = 2 boys go to water a tree 6-5 3-2=2 and 1 3=7 3

7 3 divided by 37 = 7 111

7 111**15*20=700 37 is approximately equal to 1850+18=68

Set the variable with the number of workers in each job, it should be exactly when the number of three jobs is equal to plant the most trees (not verified), and use the minimum mean square error of the number of jobs to find the corresponding number of people, you can try.

Let the number of boys digging pits and planting trees and watering be x1, x2, x3, and the number of girls is y1, y2, and y3, and the objective function is max=30x2+20y2

Constraint: x1+x2+x3=6

y1+y2+y3=5

The number of pits dug is greater than the number of trees planted, 20x1 + 10y1> = 30x2 + 20y2, the number of watering is greater than the number of trees planted, 25x3 + 15y3> = 30x2 + 20y2, where x1, x2, x3, y1, y2, y3 are all integers, and then see if there are other constraints.

Just use lindo to solve it.

First of all, you didn't finish your sophomore year of high school, and you basically can't read the books of advanced mathematics. Even if you can read it, it's hard to understand. If you want to take advanced math courses, it's best to finish high school first.

Second, on the question of improving thinking ability, learning advanced mathematics is one way, but there is not only one way to improve thinking ability.

Thirdly, I don't know exactly what your major is, but many majors have to study advanced mathematics because it is the basis for learning your major courses. Also, if you write a program that is excellent, there are many models in advanced mathematics that you can learn from.

Fourth, if you want to excel in computer science, you just need to study advanced mathematics, you must at least study advanced algebra, discrete mathematics, probability and mathematical statistics. These are all relevant mathematics courses that must be taken by engineering or science majors.

Fifth, about the book recommendation you said. I have a few books here, these are used as review books for the graduate school entrance examination, if you think it is deep, the questions can not be so difficult. Advanced Mathematics is the fifth edition of Tongji. This book has a companion workbook, and the workbook has a wide range of questions.

Sixth, I would like to emphasize again that your foundation in high school mathematics is not so good, and it will be very difficult to read advanced mathematics. If you can, it's best to finish high school math while watching, otherwise even if you understand advanced math, your knowledge will not be solid.

Seventh, if you want to go straight into the field of advanced mathematics, you have to look at the first one very carefully. It should be the chapter on functions and limits, and if you don't understand it, go to the high school textbook to find the answer, and get the basics back. And in the first chapter, you have to do a lot of exercises to build a solid foundation, otherwise you will understand the rest at all.