Exercise 4.1 unit 4 factorization class 9 new mathematics book Sindh board || STB Mathematics
When we are talking about solving any problem with factors, number theorists are the first method that comes to our mind, but unfortunately, this is not always practical when it comes to dealing with books of mathematics. In such cases that are left out in textbooks or online sources, they have to search for their own solution, sometimes not a very good one. Some people get help from other book readers or websites related to mathematics. Here I am sharing my experience of finding a good number theory and math book to solve such problems.
In this article I have shared my exercise 4.1 unit 4 factorization class 9 new mathematics book in which you need to do multiplication by 5, add 1 and multiply 2 of these numbers until you find the factor by some other method. There are some exercises from this chapter that can be used in practice when we are going to solve any problems with numbers.
Exercise 3, 7, 8
Number Theory – Multiplying Numbers
Determine your product of two, five, 10, or 100. The products are given below according to the corresponding order in which the numerators, denominators, and numerals of the numbers are performed. Use Formulas to determine your answer.
20*24*13 = 0.5
20*6 = 0.04
20*11= 0.01
20*12= 0.01
20*25= 0.04
100*6 =0.01
100*11 = 0.01
100*15 = 0.11
100*12 = 0.10
The answers might vary but the general rule of thumb:
You should count the product of two consecutive numbers in ascending order. For example, 20*14 = 0.4.
You should count the product of two consecutive numbers in descending order. For example, 20*3 = 0.02.
You should count the product of two consecutive numbers in even-numbered pairs (i.e., in prime numbers). For example,
20*5 = 0.09.
You may also find various other methods to factor numbers. Please try all it! (I will update soon!).
Hence we can find the numbers of the form 20*2 *11
20*30 = 0.5
20*3 = 0.04
20*12 = 0.01
20*1 = 0.01
20*21 = 0.01
20*13 = 0.04
20*5 = 0.02
20*3 = 0.04
20*2 = 0.01
20*11 = 0.02
20*1 = 0.02
So now we know how to identify the numbers and identify them. Now let’s discuss further how to find the factors. Let us suppose that we have the following factorization:
(500000*2) *100
(500000*1) *50
(500000*3) *100
(500000*4) *100
(250000*1) *50
(500000*2) *100
(500000*7) *50
(500000*8) *100
(500000*9) *50
(500000*10) *100
(750000*1) *50
(500000*11) *50
(500000*12) *50
(750000*13) *50
(500000*14) *50
(750000*15) *50
(500000*16) *50
(750000*17) *50
(500000*18) *50
(500000*19) *50
(500000*20) *50
(750000*21) *50
(500000*22) *50
(500000*23) *50
(500000*24) *50
(500000*25) *50
(500000*26) *50
(500000*27) *50
(500000*28) *50
(500000*29) *50
(500000*30) *50
(500000*31) *50
(500000*32) *50
(500000*33) *50
(500000*34) *50
(500000*35) *50
Suppose you work a machine based at the laboratory. With each day you operate several machines. At the end of the time you will earn 1000$ and you will get 7000 machines (both your machines as well as others). At the start of the week, you will make 2000$ and you will get 6000 machines. In such a case, you get 2000+6000 machines. You will get 1500 machines as your cashback every day. What profit will you get every day for your machine? That is why you must calculate the cashback of each machine at the beginning of the daily shift. To calculate this you sum up each machine by its working hours, then divide by each machine’s working hours (that is, multiplying each machine by 1000 minutes per one hour, for example, 24 hrs). Then you get the cashback you would get out of your machines. Finally, you sum up the total profit you will get. If you work in the lab with 20+2000 machines, then you will make 2000+2000 machines in cashback and they will give you 2000+5000 machines in cashback. Hence, on a daily basis, you make 1200+1500 machines in cashback and 1500+2000 machines in cashback. Suppose your machine has 2 hours of working time. To calculate the cashback of the machine you should multiply the machine’s working efficiency by 2000 minutes and divide by 20 minutes. And finally, you should sum up the cashback. You get 1400+2000 minutes and 2000+3000 machines. We can apply a similar calculation for calculating the cashback for different machines in a day. So every machine you can see what makes money in your machine. How much power does it need? Is there enough space for it? Are you willing to buy more machines? How many times do you want to charge a particular machine? As you calculate the cashback from the machine, then you can be more confident about the profitability of your machine.
But unfortunately, these calculations cannot find solutions to most problems. People never find the solutions. This is due to the fact that they were solved by mathematicians. Thus, before any solution or application of the system, they had to prove it as an existing or existing solution. They gave some examples of computations that proved it and made it more concrete and realistic. Even if the theorem is already known it is still a bit difficult for the common person to understand and implement, especially for those who can’t afford the high cost of computing, thus they remain uninterested in the theorem. And after solving a theorem nobody really finds solutions to the problem. It is not easy anymore to convince someone to believe that an equation exists or to think why such an equation can exist. The next thing is to show the theorem that actually works to solve the problem and even more importantly why it works that way, the proof of the theorem, or the reason why the theorem. After proving it as an existing solution or existing theorem/theorem, you have nothing else to go any length to justify why it is applicable or to apply it to solve any problem which is a consequence of the theorem. The second problem is if they have no theorem then it seems that mathematicians are useless, no one knows how to use them or if the theorem is obsolete then why bother to be part of the mathematical community? But that’s all temporary thoughts. This brings me back to the point of why it became important to separate mathematics and computer science and the whole process of doing anything in mathematics becomes very manual and hard because you need to have somebody to help them and guide you through it. We need to automate the process of solving problems.
A few years ago, Andrew Ng, Google Brain scientist and currently head of AI research, presented a paper called “Learning By Gradient Descent”. I would like to compare his approach with my thinking. So now we know what gradient descent and learning lgorithms are. I started having little thought about my mathematics since my primary languages only support base and some basic formulas like sum and product of numbers and etc. But this idea that I have found while reading Andrew Ng’s paper made me really curious and interested to know how and why this model work. And I didn’t want to just copy Andrew Ng’s model and implement it into my everyday life as well. After reading his model I realized that it was something completely different. He wrote a lot about calculus and linear algebra back in the day and how he tried to convert them into another machine learning framework with a new name. His theory was somehow different from mine. I think that Andrew Ng’s model has a different approach to learning. This is due to the fact that he gives a better explanation of what happened in the real world. I think I will explain what I mean with an example too, suppose Andrew Ng was teaching some machine training course and he wanted to teach the students how to solve equations using Linear Algebra. So he decided to write out three different models each consisting of an underlying representation of a matrix and a set of specific coefficients, a one-step process towards solving the equation but with different values and a different underlying model
No comments:
Post a Comment