The sum of three X's is (). The product of three M's is ()

Math problem: the sum of three X's is (3x). The product of three M's multiplication is (X & # 179;)

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1. How many is the sum of multiplication of 7 plus 2 divided by 5 and the remainder
2. 1. If M = 5 × 5 × 5 ×. × 5 (a total of 2007 five times), n = 2 × 2 × 2 ×. × 2（ 1. If M = 5 × 5 × 5 ×... × 5 (a total of 2007 5 multiplications) and N = 2 × 2 × 2 ×... × 2 (a total of 4685 2 multiplications), please compare the size of M and n.
3. Two numbers add up to 16, but when they are multiplied, they are 8 times larger than one of them. What are these two numbers? Two numbers add up to 16, but when they are multiplied, they are 8 times larger than one of them. What are these two numbers?
4. Ask a math problem: there are four children, one is one year older than the other, the product of multiplication is equal to 360, how many years old is the biggest?
5. When a fraction is added, subtracted, and divided with itself, the sum, difference, and quotient of the result are added to 113. This fraction is______ ．
6. When a fraction is added, subtracted, and divided with itself, the sum, difference, and quotient of the sum, difference, and quotient are added up to two fifths（
7. The sum of the sum, difference and quotient of a fraction added, subtracted and divided by itself is 13 out of 3
8. When a fraction is added, subtracted, and divided with itself, the sum, difference, and quotient obtained are added up to 1 / 5. This fraction is []
9. When a number is added, subtracted and divided by itself, the sum of its sum, difference and quotient is 11.66. What is the number?
10. A decimal is added, subtracted and divided by itself. The sum of sum, difference and quotient is 11.2. What is the decimal?
11. If you add an integer to itself, you want to subtract, multiply, divide, and add up the sum, difference, product, and quotient to 37, what's the number?
12. The connection between rational numbers and irrational numbers? Is the sum, difference, product, division and square of two irrational numbers irrational? Is the sum, difference, product, division and square of rational and irrational numbers irrational? Please explain the reason and give examples. Thank you. If you answer well, it will increase the reward!
13. Does an irrational number have the smallest absolute value
14. In real numbers, there are__ ① The largest rational number, the smallest irrational number, the number with the largest absolute value, and the number with the smallest absolute value
15. It is known that a is a rational number, B and C are irrational numbers. Which of the following numbers must be irrational? Which are not? Which are not If it must be, please explain the reason; if not, please give an example. （1）a+b；（2）ab；（3）b+c；（4）bc
16. Can you use the rules in the range of rational numbers to illustrate the absolute value of irrational numbers, the reciprocal of irrational numbers, and the fact that two irrational numbers are opposite to each other?
17. Given that the 8N power of 3 = 2, find the - n-1 power of 9 times the - 2n power of 27
18. 1 times 2 times 3 is recorded as 3! And read as the factorial of 3. Equal to 1 times 2 times 3 times 4 times 5 times 6 times 7 times 8, equal to 40320. Equal to 10! Equal to?
19. VB sum, sin (x) = x / 1-x ^ 3 / 3! + x ^ 5 / 5! - (- 1) ^ (n-1) * x ^ (2 * n-1) / (2n-1)! Exclamation mark means factorial Private Sub Form_ Click() Dim x%,,i%,q% X = Val (InputBox ("please enter the value of X")) Do While t >= 10 ^ (-5) s = s + t n = n + 1 For k = 1 To 2 * n - 1 q = q * k Next k t = ((-1) ^ (n - 1)) * (x ^ (2 * n - 1)) \ q Loop Print "s="; s End Sub It ends when the value of the nth item is less than 10 ^ - 5
20. Using java to calculate the factorial of 1 and add it to the factorial of 20. What's wrong with me, //Calculate + 2! + +20!. program name: X03_ 06 For.java public class X03_ 06For{ public static void main(String args[]){ int sum=0,n,m,a=1; for(n=1;n