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The set of positive integers and negative integers is () A. Set of integers B. set of rational numbers C. set of natural numbers D. none of the above is true
Because the combination of positive integer set and negative integer set cannot form an integer set (integer set includes positive integer set, 0 and negative integer set), it is included by rational number set (integer set and fractional set), and natural number set contains positive integer set, but not negative integer set, so the above statements are all wrong
What set can be formed by combining integer set and fractional set?
You still have some questions to number, I will add extra points
(2) What set can be obtained by removing the set of negative integers from the set of negative rational numbers?
(3) What set can you get by removing the set of natural numbers from the set of integers?
Come on, before nine
(1) Rational number set
(2) Negative fraction set
(3) Set of negative integers
What is the letter of natural number? Integer set? Real number set?
In set theory, the set of natural numbers n includes the element "0"
If it refers to the general natural number (set) (excluding the element "0"), it is represented by N + or n *, where the sign + or * is the superscript
The set of integers is represented by Z
The set of real numbers is represented by R
3 hours 35 minutes=______ Hours (mark)
35 △ 60 + 3 = 3712 (hours), so 3 hours 35 minutes = 3712 hours; so the answer is: 3712
（1+1/2）×（1-1/2）×（1+1/3）×（1-1/3）×...×（1+1/99）×（1-1/99）=?
=(1-1/2)(1+1/2)(1-1/3)(1+1/3)(1-1/4)(1+1/4)…… (1-1/99)(1+1/99)
=1/2 ×3/2×2/3 × 4/3×3/4 × …… ×98/99 ×100/99
=1/2×100/99
=50/99
When x = 0, the range of the function y = 3x + 1 / 2x needs a process. Thank you
It should be "when x > 0"
Y = 3x + 1 / (2x) > = 2 radical (3x * 1 / 2x) = 2 radical (3 / 2) = 6 radical
That is, when 3x = 1 / 2x, x = root 6 / 6, take "="
So, the range is [root 6, + infinity]
5,12,21,34,53,80,( )
A digital reasoning problem, which kind of intelligent person to help explain, thank you
12-5=7
21-12=9
34-21=13
53-34=19
80-53=27
The relationship between the above differences is 2, 4, 6, 8, which should be followed by 10, so the answer is 80 + 27 + 10 = 117
Factorization: 2012-1992=______ ．
2012-1992 = (201 + 199) (201-199) = 800, so the answer is 800
If the piecewise function is continuous at the piecewise point, do you want to use the definition to find its derivative
The derivative of piecewise function is usually calculated by definition at the piecewise point, because the two sides of the piecewise point tend to be different
However, especially for continuous piecewise points, the existence theorem of derivative limit can also be used
Simple calculation of 12.56 + 2.8-8.56
＝12.56-8.56+2.8
＝4+2.8
RELATED INFORMATIONS
- 1. The average of five natural numbers is 28. If the five numbers are arranged from small to large, the average of the first three numbers is 19, and the average of the last three numbers is 42, What's the number in the middle?
- 2. After three consecutive natural numbers 1, 2, 3 are removed, the average of the remaining numbers is 19 and 8 / 9 If there are exactly two primes in the number, what is the maximum sum of the two primes?
- 3. The sum of four continuous natural numbers is 19 / 20. What is the average of four continuous natural numbers
- 4. The four numbers 0 1 2 3 can be used to form one bit integer, two bit integer, three bit integer and four bit integer There are () natural numbers which are multiples of 3
- 5. The last three digits of the product of a natural number multiplied by 17 are 123. What is the smallest integer?
- 6. All natural numbers are integers, and all integers are natural numbers______ (judge right or wrong)
- 7. A natural number is a part of an integer, which can be understood as an integer of 0 and 0 or an integer of 0 Natural numbers are part of integers, which can be understood as integers of () 0 and (), or integers of (). It can be said that natural numbers are integers, but integers are not natural numbers
- 8. What is the sum of the largest negative integer and the smallest natural number（
- 9. 3. 0, 1.7, 5%, -- 7, 9, which are positive numbers, which are natural numbers, which are negative numbers, which are integers
- 10. Are there negative numbers in natural numbers
- 11. What are the positive integers of natural numbers? What are the integers? What are the rational numbers? What are the real numbers
- 12. In the tenth a, a is a nonzero natural number; when a is (), it is an integer
- 13. All natural numbers are integers, right
- 14. The following statement is correct () A. Integers are natural numbers. B. 0 is not natural numbers. C. positive and negative numbers are collectively called rational numbers. D. 0 is an integer rather than a positive number
- 15. The reciprocal of non-zero natural numbers is smaller than 1______ ．
- 16. If the number on a digit of a natural number is 0 or 5, then the number must be a multiple of 5 (2) All even numbers except 2 are composite numbers (3) Even numbers are not multiples of 2 (4) A three digit number composed of 1, 3 and 5 must be a multiple of 3 (5) In nature books, except prime numbers, the rest are composite numbers (6) At least one of three continuous natural numbers is a composite number (7) 1 is the factor of any non-zero natural number (8) Because 8x5 = 40, 8 and 5 are factors and 40 is a multiple (9) The sum of two odd numbers must be even (10) The multiple of a number must be greater than its factor
- 17. Natural numbers, integers, etc. What are the definitions of these numbers? I immediately went to senior one, suddenly found some primary school nouns do not understand 1: Integers 2: Natural number 3: Rational and irrational numbers 4: Real and imaginary numbers 5: Plural 6: Common divisor and common multiple 7: Even number and odd number (this can not be explained)! I hope you can tell me what the definition of these numbers is? For example, it would be better! I also forgot which * * numbers are still available in primary schools! If there are any, please answer!
- 18. The mathematical problem expresses n as the product of four natural numbers less than 1 Given n = 88... 8 (1000) 00... 0 (1000), what is the product of 4 natural numbers greater than 1?
- 19. "The difference between unit" 1 "and natural number 1"
- 20. Is o an integer or a natural number? The denominator of a fraction must be an integer