![](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>)
Write a proposition that the sum of two rational numbers is the inverse proposition of rational numbers. If the inverse proposition is not sure of the answer, don't mistake people!
Inverse proposition: if the sum of two numbers is a rational number, then the two numbers are rational numbers
No proposition: if both numbers are not rational, then the sum is not rational
Inverse negative proposition: if the sum of two numbers is not rational, then both numbers are not rational. (at least one of the two numbers whose sum is not rational is not rational.)
The inverse negative proposition of "the sum of two rational numbers is rational"
If the sum of two numbers is not rational, then both numbers are not rational
A large city near 122 degrees west longitude and 38 degrees north latitude
San Francisco, Los Angeles
Judgment: two adjacent natural numbers, one of which is odd, then the other must be even. Explain the reason, two adjacent natural numbers 0 and 1
0 is even
Two adjacent natural numbers, there must be one can be divided by 2, the other divided by 2, the remainder is 1
So that sentence is correct
If the equation | x + 1 | - | x-3 | = a has innumerable solutions, then the value of the real number a is?
Xueba, please remember to bring the process. Thank you~
If there are innumerable solutions, the equation holds after being solved
So | x + 1 | - | x-3 | is identical to a constant a
therefore
|x+1|-|x-3|
=x+1-(x-3)
=x+1-x+3
=4
or
|x+1|-|x-3|
=-(x+1)+(x-3)
=-x-1+x-3
=-4
That is, a = 4 or a = - 4
3 / 5 to 1 is the simplest integer ratio (), and the ratio is ()
3 / 5 to 1 is the simplest integer ratio (3:5), and the ratio is (3 / 5)
What is (+ 1) + (- 2) + (+ 3) + (- 4) + ·· + (+ 99) + (- 100)?
They were divided into 100 / 2 = 50 groups
As you can see, the sum of the two numbers in each group is - 1
Then + 1) + (- 2) + (- 3) + (- 4) + ·· + (+ 99) + (- 100)
=-1*50
=-50
On logarithm: does LG square 2 refer to the square of (LG2)?
Yes
How many square kilometers is 150 hectares?
150 hectares is equal to 1.5 square kilometers
Simple calculation of 5.4 × 99
5.4×99
=5.4x(100-1)
=5.4x100-5.4x1
=540-5.4
=534.6
In the top right corner of my answer, click comment, and then you can choose satisfied, the problem has been solved perfectly
RELATED INFORMATIONS
- 1. Write down the inverse proposition of the following proposition, and judge the truth of the original proposition and the inverse proposition. (1) natural number must be rational number. (2) if | a | = | B | & _; then a = B (3) If a = B, then a ^ 3 = B ^ 3
- 2. For any rational number x, x-3 + X-6, is there the smallest absolute value? Why For any rational number x, x-3 + X-6, is there the smallest absolute value and why
- 3. What is the square of rational number 2?
- 4. Let a and B be rational numbers. Judge whether the following statements are correct and explain the reasons ① If a = - B, then | a | = | B| ② If | a | = | B |, then a = - B
- 5. The equivalent proposition to the proposition "if a ∈ m, then B ∉ m" is () A. . if & nbsp; a ∉ m, then & nbsp; B ∉ MB. If B ∉ m, then & nbsp; a ∈ MC. If & nbsp; a ∉ m, then & nbsp; B ∈ MD. if B ∈ m, then & nbsp; a ∉ M
- 6. a. B ∈ R, then the equivalent proposition of a square + b square = 0 is
- 7. Judge whether the following propositions are true or false, and give reasons (1) If a + B + C = 180 °, then a, B and C must be the three inner angles of the triangle (2) If a ∩ B ≠ &;, B is really contained in C, then a ∩ C ≠ &;
- 8. Judge the true proposition or false proposition and explain the reason
- 9. Judge whether the following propositions are true or false. If they are true, give reasons. If they are false, give counter examples (1) If a is a real number, then the square plus 1 is greater than 0 "; (2) If the square of a is greater than the square of B, then a is greater than B; (3) A quadrilateral with equal sides is a square
- 10. If two sides of an angle are parallel to each other, is it true that the two angles are equal!
- 11. If the real number a B satisfies a + B < 4, then a = 1 and B = 2 find its inverse proposition, no proposition, inverse no proposition, and its true and false
- 12. Please give a counter example to show that the following proposition is false 1. Equal angles are right angles 2, if a + B = 0, then a = 0, B = 0 3. If ∠ 1 is greater than ∠ 2, then ∠ 1 is an obtuse angle
- 13. A counterexample is given to show that the following proposition is a false proposition, [1] if a > b, then 1 / A
- 14. If AB = 0, then a = 0 is a false proposition
- 15. Judge whether the following propositions are true or false? If false, give counter examples; if true, give proof (1) An angle must be less than its complement (2) If two lines are parallel, the inner angles of the same side must not be equal
- 16. Give counter examples to prove that the following propositions are false propositions (1) if a > b, then 1 / A
- 17. The counter example is used to show that the proposition "if M > 1, then x ^ 2-2x + M = 0 has real root" is a false proposition
- 18. Judge whether the following propositions are true or false. If they are true, please give proof. If they are false, please give counter examples 1. If the two sides of a corner are parallel to the two sides of the other corner, then the two corners are equal 2. Two triangles of equal area are congruent triangles 3. The sum of the distances from any point in the equilateral triangle to the three sides of the triangle is equal to the height of the equilateral triangle 4. There are two congruent triangles with equal heights on both sides and one of them 5. There are two congruent triangles whose heights on the two sides and the third side correspond to the same
- 19. To judge a proposition, if a > 0, then the bisection of a > the true or false of A. if it is a true proposition, please prove it. If it is a false proposition, please give a counter example
- 20. Judge the truth of the negation of proposition p: the square of (- 2) under the root sign = 2 Judge the truth of the negation of proposition p: the square of (- 2) under the root = - 2 The title was copied wrong just now sorry