Under what circumstances can both sides of the equation multiply or divide by an unknown number
It's OK in any case, but it can't be zero in the same division
RELATED INFORMATIONS
- 1. The radius of a circle is 4 decimeters, and its circumference is______ Decimeter, area is______ Square decimeter
- 2. Simplification ratio Less difficult, no points
- 3. In RT △ ABC, the bisector of acute angle a intersects with the bisector of the adjacent complementary angle of acute angle B at point D, then ∠ ADB=______ Degree
- 4. How to deal with the problem that the equal sign can't be obtained when seeking the maximum value in the basic inequality Root XY ≥ 2 root 3 / 5 If and only if x = y = 2 radical 3 / 5, the minimum value of radical XY is 2 radical 3 / 5, At the same time, if 3x = 4Y (x ≠ y), what is the minimum value of root XY? Can only the above conditions be answered? If x, y satisfy x + 3Y = 5xy, then the minimum value of 3x + 4Y is?
- 5. The area of a triangle is equal to that of a square. The side length of the square is 12cm, the bottom of the triangle is 18cm, and its height is () cm
- 6. F (x) = LG (1 + 2 ^ x + 4 ^ XA) / 3, where a ∈ R, if f (x) is meaningful when x ∈ (- infinity, 1], find the value range of A
- 7. The bottom of a cone is 8 cm in diameter and 6 cm in height. It is filled with water. Pour all the water into the bottom. The area is 12.56 How many centimeters is the water depth in a square centimeter cylindrical container?
- 8. Given that 14a2 + 9b2 − a + 12b + 5 = 0, find the value of (a − 2) 2A2 − B2
- 9. A triangle cloth area is 120 square decimeters, the bottom is 30 decimeters, how many decimeters is the height
- 10. Are all odd numbers prime
- 11. In △ ABC, if the lengths of its three sides are 9, 12 and 15 respectively, then the area of the rectangle formed by two such triangles is______ .
- 12. Can 98 × 96 / 97 be simplified?
- 13. a*0.01=(a-200)*0.25 For example, find the value of A a*c=(a-b)*0.25 Find a a*c=(a-b)*0.25 a*c=a*0.25-b*0.25 0.25*a-a*c=b*0.25 a*(0.25-c)=b*0.25 a=b*0.25/(0.25-c) I feel like it's wrong a×0.01=(a-200)×0.25 0.01a=0.25a-50 0.24a=50 a=625∕3 How does a = 625 / 3 625 come from, and how does 3 come from? a*c=(a-b)*0.25 ac=0.25a-0.25b (1-0.25)a=-0.25b-c 0.75a=0.25b-c A = (1 / 3) B - (4 / 3) C the French version of 123 According to the above formula, C = 0.01, B = 200, the result is a = 66.65 But the result is a = 208.33, which seems to be wrong
- 14. A = (0.0 ····· 025) 2000 zeros, B = 0. (0 ····· 0) 16 2001 zeros, try to find a + B, a-b.a · B.A divided by B
- 15. It is stipulated that * is a kind of operation symbol, a * b = B power of a, and 3 * 2 = ()
- 16. It is stipulated that * is an operation symbol, a * b = B power of a - a power of B, try to calculate 3 * 2
- 17. If we define a new operation "*" and a * b = B power of a - a power of B, then 4 * (3 * 2)?
- 18. If we define the power a of a ⁃ B = 10, the power B of * 10, and the power B of a ⁃ B = (the power a of 10), we calculate the values of the following formulas (1)、(4※3)×(2☆5);(2)、(3※5)×(6☆3) Given the square of (a + 1) + | B-2 | + (1 / 2 + C) = 0, find the value of the cube of (- 2 / 3a, the square of C) and (4 / 3a, the square of C) × (- A, the square of B)
- 19. New definition calculation (a △ B = 10A power X 10B power) verification: (m △ n) △ P is equal to m △ (n △ P) Define an operation: a △ B = 10A power, x10b power, for example: 3 △ 4 = 10 & # 179; X10 power From the meaning of the title, we can get: to verify whether (m △ n) △ P is equal to m △ n △ P
- 20. The value to the 13th power is? If the new operation m * n = mn-m-n + 1 is defined, then when a * b = 0, the value of power 2012 of (A-1) and power 2013 of (B-1) is