A mathematical problem about set in grade one of senior high school Set {(x, y) | y = x2-1, | x | less than or equal to 2, X belongs to Z} How to express it by enumeration,

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• 1. What is the linear equation passing through the point (- 1,2) and tangent to the square of circle x + the square of y = 5?
• 2. The equation of line passing through point (5,1) and tangent to circle "x square + y square = 25" is -
• 3. A mathematical problem in the first chapter of compulsory senior one: the square of quadratic function y = ax - 4x + a-3d for any x belongs to R, the value of Y is negative, find the range of A A mathematical problem in the first year of senior high school: the square of quadratic function y = ax-4x + a-3d for any x belongs to R, the value of Y is negative, and the range of a is calculated I'm sorry, there is a mistake in the title. If there is no D, it's a mistake! What is correct is a mathematical problem that must be solved in grade one of senior high school: the square of quadratic function y = ax - 4x + A-3. For any x belongs to R, the value of Y is negative, and the range of a is calculated
• 4. Given the set a = {x │ - 1 ≤ x ≤ 2}, B = {y │ y = 2x-a, a ∈ R, X ∈ a}, C = {Z │ z = x & # 178;, X ∈ a} Is there a real number a so that C is included in B? If it exists, find out the value range of A. if it does not exist, explain the reason.
• 5. Set a = {y | y = x & # 178; - 1, X ∈ r}, B = {y | y = - 2x & # 178; + 2, X ∈ r}, find a ∩ B Set a = {y | y = x & # 178; - 1, X ∈ r}, B = {y | y = - 2x & # 178; + 2, X ∈ r}, find a ∩ b set P = {y | y = 3x-1, X & gt; 1}, q = {y | y = - 2x & # 178; + 10, X ∈ r}, find P ∩ Q
• 6. Set a = {y | X & # 178; + 2x, - 2 ≤ x ≤ 2} B = {x | X & # 178; + 2x-3 ≤ 0} take any element a in set a, then what is the probability that a belongs to B Eager for answers
• 7. If M = {y | y = x2 + 1}, n = {y = | y = 3-x2}, then M intersects n =?
• 8. Given a = {(x, y) | x2 + y2-6x-8y + 20 = 0}, B = {(x, y) | kx-y-4k + 3 = 0}, then the number of elements of a ∩ B is () A. 0B. 1C. 2D. 3
• 9. If the set a {x | x + A / x2-4 = 1} is a single element set, then the value set of a is m= The teacher's answers were 2, - 2, - 17 / 4, but I wrote - 17 / 4 and - 4, X + a divided by the square of x minus 4 equals 1
• 10. How many real roots of equation 2x ^ 2-6x / (x-3) = x + 5
• 11. One math problem in high school, about set The known set M = {x ∈ R / 5AX ^ 2-3x + 2 = 0, a ∈ r} If there is at most one element in M, find the value range of real number a Online and other answers
• 12. Given the set a = {- 4,2a-1, the square of a}, B = {a-5,1-a, 9}, whether there is a real number a such that there are four elements in the set a and B, and calculate the value of A
• 13. Given the equation 3x + 3 (x + 2) = 24, please write a mathematical problem (to be practical) and solve it
• 14. Given the equation 3x + 3 (x + 2) = 24, please write a mathematical problem (to be practical) and solve it
• 15. Solve the following equation: (3x-2) ^ 2 = (x + 4) ^ 2
• 16. How to understand (CUA) ∩ (cub) = Cu (a ∪ b)
• 17. For the dual rate proof of set, Cu (a ∩ b) = CUA ∪ cub, for the strict logic proof, no Venn diagram or enumeration
• 18. It is proved that Cu (a + b) = CUA + cub The answer should be detailed, the process should be standard, and it's better to understand. Few of us can understand what our math teacher said
• 19. U = {1,2,3,4,5,6}, a = {2,3,5}, B = {1,4}, find Cu (AUB) and (CUA) ∩ (cub)
• 20. When u = {0,1,2,3,4,5,6,7,8}, a = {0,1,3,4,7}, B = {1,2}, verify that Cu (a ∪ b) = CUA ∩ cub and Cu (a ∩ b) = CUA ∪ cub There should be a detailed process, thank you