If a and one-half B are opposite to each other, and B is not equal to 0, then the reciprocal of a is 2 c-2b D-B of A2B
a=-b/2
1/a=-2/b
Choose D
A natural number that is not equal to 0 is multiplied by the true fraction, and its product () is the original number
A natural number not equal to 0 multiplied by a true fraction, its product (less than) the original number
RELATED INFORMATIONS
- 1. If a number is multiplied by a true fraction, the product must be larger than that number______ (judge right or wrong)
- 2. A true fraction multiplied by a number must be smaller than that number
- 3. In the triangle ABC, we know that a = 18. B = 22. Angle a = 45 degrees, then the number of such triangles is?
- 4. If a, B, C are the three sides of triangle ABC, and a (a-b) + B (B-C) + C (C-A) = 0, try to judge the shape of triangle ABC and explain the reason
- 5. As shown in the figure, in RT △ ABC, ∠ BAC = 90 °, ab = AC, and points m and N are on edge BC. (1) as shown in Figure 1, if am = an, prove: BM = CN; (2) as shown in Figure 2, if M and n are any two points on edge BC, and satisfy ∠ man = 45 °, then are line segments BM, Mn and NC possible to make equation Mn2 = BM2 + NC2 stand? If yes, please prove; if not, please give reasons
- 6. High school a basic inequality problem! Given that x + 2Y = 1, both X and y are greater than 0, find the minimum value of 1 / x + 1 / y Because 1 / x + 1 / Y "2 √ (1 / XY) If and only if 1 / x = 1 / y is obtained, then x = y Substitute x + 2Y = 1 to get x = y = 1 / 3 So the minimum value is 2 / 3
- 7. Some basic inequalities in Senior High School 1. For any x > 0, X / (the square of X + 3x + 1) ≤ a, then the value range of a is? 2. Let a > b > 0, then the minimum value of the square of a + 1 / AB + 1 / a (a-b) is?
- 8. High school inequality proof Given ABC = 1, and a, B, C are real numbers, it is proved that 1 / A + 1 / B + 1 / C + 3 / (a + B + C) > = 4
- 9. What does the number 58 at the bottom of the plastic cup mean
- 10. The new operation * is defined as a * b = (1 / a multiplied by 1 / b) finding 3 * (4 * 5)
- 11. A is a number that is not equal to 0. Please explain which of a + 3 / 5 and a multiplied by 3 / 5 has the larger result
- 12. What's 1 times 2 / 1 + 2 times 3 / 1. + 99 times 100 / 1? Note that 1 times 2 is the denominator~
- 13. How many times how many times how many is equal to how many plus how many plus how many. These six numbers are required to be the same number
- 14. How much is four quarters minus one sixth? How much is three quarters plus three tenths?
- 15. Given that the product of a's Square plus BC is 14, the product of B's Square minus 2 times BC is - 6, find the product of 3 times a's Square plus 4 times b minus 5 times BC
- 16. 0 × (- M) = (), m × 0 = () (- 1 / 3) × 3 / 7 = (), (- 3 / 16) × (- 16 / 9) = () (- 5) × (1 + 1 / 5) = (), X · 1 / x = () (x ≠ 0) 7 of 8 × (- 3 of 10) × 0 × (17 of 19) = () A > 0, B < 0, then AB 0 (greater or less than)
- 17. M and N are reciprocal. The sum of the product of M and N and X is 25 / 7. What is x?
- 18. A number plus 52.2 times 52 plus itself minus 2.5% of 400 is exactly 2740. What's the number
- 19. It is known that a * b = 380, if a is expanded to 3 times of the original, then the product is (); if B is reduced to 1 / 2 of the original, then the product is ()( It is known that a * b = 380, if a is expanded to 3 times of the original, then the product is (); if B is reduced to 1 / 2 of the original, then the product is ()(
- 20. The product of a number (except 0) multiplied by a true fraction () is a number. A. greater than. B. less than. C. equal to. Speed