![](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>)
The known set a = {XLX & # 178; - 4x + 3
Set a = {XLX & # 178; - 4x + 3 a ≤ - 2 ^ (1-x)
∵1
If a = {x ∈ R | x2-4x + 3 ＜ 0}, B = {x ∈ R | (X-2) (X-5) ＜ 0}, then a ∩ B=______ ．
∵set a = {x ∈ R | x2-4x + 3 ＜ 0}, ∩ a = {x | x | 1 ＜ x ＜ 3}, ∵ B = {x ∈ R | (X-2) (X-5) ＜ 0}, ∩ B = {x | 2 ＜ x ＜ 5}, so the answer is {x | 2 ＜ x ＜ 3}
Given the set a = {x | X & # 178; - 2 ≥ 0} B = {x | X & # 178; - 4x + 3 ≤ 0}, then a ∪ B =?
X is greater than the root 2 and less than 3
The known set a = {x │ [(x-a) / (x + 1)] ≤ 0}, B = {x │ X & # 178; - 4x + 3 ＞ 0}
(1) . a = 4 is, find a ∪ B, a ∩ B (2). If a contains B, find the value range of real number a
(1) A ∪ B = {x | x belongs to R} a ∩ B = {x | - 1
RELATED INFORMATIONS
- 1. Given the set a = {x | X & # 178; - 160}, find a ∪ B
- 2. Let L: y = KX + 2 and the square of ellipse C: 2 / x plus the square of Y 1 intersect at two different points a, B, O as the origin of coordinates, (1) find the straight range of K; (2) if OA. Ob = 1, find the equation of line L; (3) when k is the value, the area of triangle OAB will get the maximum value;
- 3. Through the coordinate origin, the line L and the ellipse (x-3) ^ 2 / 6 + y ^ 2 / 2 = 1 intersect at two points a and B. if the circle with diameter AB just passes through the left focus F of the ellipse Find the inclination angle of a straight line
- 4. If the point m (3,0), the ellipse x24 + y2 = 1 and the line y = K (x + 3) intersect at points a and B, then the perimeter of △ ABM is () A. 4B. 8C. 12D. 16
- 5. The distance from the point on the curve m to the point F (1,0) is smaller than the distance from it to the straight line L: x + 2 = 0,
- 6. The distance from the moving point to the point (1,0) is equal to the distance from the moving point to the straight line y + 2 = 0
- 7. Find the maximum and minimum of the function f (x) = x squared by e to the - x power
- 8. Given that f (x) = x ^ 3-2x ^ 2 + X-2, if the extremum of function g (x) = f (x) + (1 / 3) MX exists, then the value range of real number m is?
- 9. When x ∈ [0,2], the function f (x) = ax ^ 2 + 4 (A-1) x-3 gets the maximum value when x = 2, then the value range of A
- 10. Given the function f (x) = x ^ 3 + ax * x-x + 2, if f (x) is a decreasing function on (0,1), then the maximum value of A
- 11. Given the set a = {X / X & # 178; + 4x = 0, X ∈ r} B = {X / X & # 178; + 2 (a + 1) x + A & # 178; - 1 = 0, a ∈ R, X ∈ r}, if B & # 8838; a, find the value of real number a
- 12. If the solution set of inequality AX2 + bx-2 > 0 is {x │ X1 / 3}, then the value of AB is
- 13. When x is equal to 1, the value of the square of 3ax + BX is 2, then when x-3, the square of AX + BX is equal to 1
- 14. Given that x = - 1 is the root of the equation AX2 + BX + C = 0 (B ≠ 0), then AB + CB = () A. 1B. -1C. 0D. 2
- 15. Set a = {x | - 1 less than or equal to x less than 2}, B = {x | x less than a}, if a intersection B is not equal to the empty set, find the value range of A Why can't a ＜ 2? It's also in that range, and there is intersection
- 16. Let a = [(x, y) | Y > = | X-2 | x > = 0], B = [(x, y) | y
- 17. Given the set a = {x | x is less than or equal to 2, X belongs to R}, B = {x | x is greater than a} if AUB = R, then the value range of A
- 18. Mathematics: the following statements are correct: 1. X = 4 is the solution set of inequality X-1 > 2. 2. The solution of inequality - 2x > 4 is X
- 19. Two real roots x1, X2 of 2 + 2x + T (t is all real numbers), if lx1l + lx2l = f (T), find the analytic expression of function f (T) (x ~ 2 is the root of x)
- 20. It is known that the function f (x) = x (x ~ 2 + 2aX + 2A + 8) has three zeros x1, X2 and X3