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The inverse scale function y = - 2 / x, when x is greater than 2, the value range of Y is --- when x is less than or equal to 2, the value range of Y is --- when 1 is less than or equal to X
When x > 2, 0
For the inverse scale function y = 6 / x, when x is greater than 1, what is the value range of Y; when x is less than or equal to, what is the value range of Y?
When x is less than or equal to 1, what is the value range of Y?
Solution · (1) when x ≥ 1
That is, 0 ＜ 1 / X ≤ 1
That is, 0 < y ≤ 1
(2) When 0 < x ≤ 1, 1 / X ≥ 1, that is, y ≥ 1
When x < 0, 1 / x < 0, that is y < 0
When x ≤ 1, y ≥ 1 or Y < 0
Is 1 / x + y = 10 a quadratic equation of two variables
Of course not
I think there are two unknowns in the equation
If the reciprocal of X, y and is equal to 1, it is a quadratic equation of two variables
RELATED INFORMATIONS
- 1. Bivariate linear equation: X / 3-y / 4 = x / 2 + Y / 3-10 = 3 (with process) There is another problem: when solving the equations {ax + by = 26, the correct solution is {x = 4) cx+y=6 y=-2 Because Xiao Ming wrongly wrote C, the solution is {x = 7} y=3 The correct values of Qiu a, B, C When {ax + by = 26 CX + y = 6, {x = 4, y = - 2 And the above question!
- 2. In the bivariate linear equation x + 6y-4 = 0, when x is equal to 4, how much is y; when y = - 1, how much is x?
- 3. Solving X-Y = 500 and X + 15 ‰ X - [Y-10 ‰ y] = 950 by the method of adding, subtracting and eliminating elements of binary linear equations
- 4. 1. The equation (2x + 1) - (y + 3) = x + y is transformed into a formula containing x to express y, and the corresponding values of Y are obtained when x = - 2,0.1, two fifths respectively 2. Write a group of integer solutions, a group of negative integer solutions and a group of positive integer solutions of the quadratic equation 4x-3y = 15 (add 20 points to the formula)
- 5. A piece of iron wire is m decimeter long. It is used to form a square and a circle. The square area is () A. 1 / 2 B.2 times C. π / 4 D.4 π times
- 6. Binary linear equations 2x-5y plus 3 equals 0ax-y = 7
- 7. The solution is 0.5 out of 6
- 8. Solution ratio: 1 / 2: 1 / 4: X
- 9. (1.25 + x): 0.25 = x: 1.6 solution ratio
- 10. 4 / x = 5 / 80 7.2:12 + 9 / 1: x 2.5 + 6 / 15.6:2.88 + 2.6: X solution ratio
- 11. Given the first-order function y = KX + B, when 0 ≤ x ≤ 2, the value range of the corresponding function value y is - 4 ≤ y ≤ 8, then the value of KB is______ ．
- 12. On the function y = KX + B (k, B are not equal to 0 constant), the following statement is correct () A. Y is proportional to X. B. y is proportional to KX. C. y is proportional to x + B. D. y-b is proportional to X
- 13. When - 3 ≤ x ≤ 1, the corresponding value of Y is 1 ≤ y ≤ 9, then the value of KB is 1______ ．
- 14. The first-order function y = KX + B, when x = 4, y = 9; when x = 6, y = 3, what is k What is the value of y when x = 1
- 15. The straight line y = KX + B is parallel to the straight line y = - 2 / 3 * x + 5, and the function expression of the straight line can be obtained by passing through the point a (0, - 3) (1); (2) the straight line can be generated by the straight line The straight line y = KX + B is parallel to the straight line y = - 3 / 2 * x + 5 and passes through point a (0, - 3) (1) Find the function expression of the line; (2) How to translate the line y = - 2 / 3 * x + 5?
- 16. Determine the analytic formula of the function y = KX + B. y is proportional to x, x = 5, y = 6
- 17. When k is equal to, y = kx-x is a linear function?
- 18. If the image of the linear function y = KX + B passes through the point (2,3), y increases by three units every time x increases by one unit, then the analytic formula is
- 19. If in the linear function y = KX + B, when x = 2, y = 3, every time x increases by one unit, the corresponding function value y increases by three units, the analytic expression of this linear function is
- 20. If the image of a linear function y = KX + B is parallel to the straight line y = half x-3 and passes through the point (2, - 1), then what is the analytic expression of the linear function? If the image of the first-order function y = KX + B is parallel to the straight line y = half x-3 and passes through the point (2, - 1), then the analytic expression of the first-order function is_____ ?