For the function y = 2x, when it is less than or equal to 2, the value range of Y is y____ 1 or Y_____ .
When x is less than or equal to 2, the value range of Y is less than or equal to 4
Given the function y = 12x + 1, when y ≤ - 1, the value range of X is______ .
When y ≤ - 1, 12x + 1 ≤ - 1, the solution is x ≤ - 4, so the answer is: X ≤ - 4
RELATED INFORMATIONS
- 1. It is proved that no matter what the value of K is, there are two intersections between the line L: kx-y-4k + 2y-3 = 0 and the circle C: X & # 178; + Y & # 178; - 6x-8y + 21 = 0 It is proved that no matter what the value of K is, there are two intersections between the line L: kx-y-4k + 2y-3 = 0 and the circle C: X & # 178; + Y & # 178; - 6x-8y + 21 = 0
- 2. The center of the circle x ^ 2 + y ^ 2-4x + 2Y = 0 is () and the radius is ()
- 3. Given that the equation of a circle is x ^ 2 + y ^ 2 + 4x-2y + 3 = 0, then the center coordinates and radius of the circle are
- 4. Let - 5 belong to the set {xix2-ax-5 = 0}, then the sum of all elements in the set {x2-4x-a = 0} is? "
- 5. If there is only one element in the set a = {x | x2 + ax + 1 = 0}, then the value of a is () A. 0b. 0 or 2C. 2D. - 2 or 2
- 6. Let a = {x │ X2 - (a + 2) x + 2A
- 7. The known set a = {x | x2-4x + 2A + 6 = 0}, B = {x | x}
- 8. Let m = {0,1}, N + {11-A, LGA, 2 ^ A, a}, whether there is a real number a, such that M intersects n = {1}
- 9. The focus of the ellipse x ^ 2 + y ^ 2 = 1 is F1, F2, and the point P is the moving point on it. When the angle f1pf2 is an obtuse angle, the abscissa of point P is ∩_ ∩)
- 10. The value range of M is obtained when the line y = x + m intersects the ellipse x ^ 2 / 16 + y ^ 2 / 9 = 1 X square / 16 + y square / 9 = 1: 9x ^ 2 + 16y ^ 2-144 = 0 Take y = x + m into the elliptic equation, and 9x ^ 2 + 16 (x + m) ^ 2-144 = 0 Sorted: 25X ^ 2 + 32mx + 16m ^ 2-144 = 0 Because there are two intersections, so Δ > = 0 That is, Δ = (32m) ^ 2-4 * 25 * (16m ^ 2-144) > = 0 Sorted out: m ^ 2-25
- 11. The function y = - 2x ^ 2-4x + 3 is known. When the independent variable x is in the following value range, calculate the maximum or minimum value of the function respectively, and calculate the value of the function And find the value of the corresponding independent variable x when the function takes the maximum or minimum value
- 12. x²+4x+3
- 13. What is the solution of X & # 178; - 13X + 12 = - 4x & # 178; + 18?
- 14. As shown in the figure, it is known that the image of quadratic function y = x2 + BX + C passes through points (- 1,0), (1, - 2). When y increases with the increase of X, the value range of X is___ .
- 15. It is known that the image of quadratic function y = x + bx-3 passes through the point (- 2,5)
- 16. As shown in the figure, it is known that the image of quadratic function y = x2 + BX + C passes through points (- 1,0), (1, - 2). When y increases with the increase of X, the value range of X is___ .
- 17. How to fill in the brackets of X & # 178; + 1 / X & # 178; = (x + 1 / x) & # 178; - () = (x-1 / x) & # 178; + ()?
- 18. Remove the brackets from (x-4) - (- y + 2Z)______ [urgent]
- 19. Mathematics problem of grade one 1. Add brackets in the polynomial m4-2m2n2-2m2 + 2n2 + N4; 【1】 Combine the four terms and put them in the brackets with "+" in front 【2】 Combine the quadratic terms and put them in the front with "-" 2. Given 2x + 3y-1 = 0. Find the value of 3-6x-9y 3. Let the quadratic power of X + xy = 3. The quadratic power of XY + y = - 2. Find the value of the quadratic power of 2x - xy-3y 4. Write the polynomial 10x ^ 3-7x ^ 2Y + 4xy ^ 2 + 2Y ^ 3-5 as the difference between two polynomials, that is, the subtraction does not contain the letter y 5. Add 2x ^ 2 + 3x-6 as required 【1】 Write the sum of a monomial and a binomial; 【2】 Write the difference between a monomial and a binomial 6. Write the polynomial x ^ 3-6x ^ 2Y + 12xy ^ 2-8y ^ 3 + 1. Into the sum of two integers, so that one of them does not contain the letter X 7. Let 3x ^ 2-x = 1. Find the value of 9x ^ 4 + 12x ^ 3-3x ^ 2-7x + 2000 By the way, let's talk about the rule of adding brackets
- 20. 1. Given that the solutions of equation 4x + 2m = 3x + 1 and equation 3x = 2m = 6x + 1 are the same, then M =? 2. If (7y-4 / 2) and (y + 2 / 5) - 2 are opposite to each other, then y =? 2? This is the two exercises of the equation of one variable of grade one in junior high school