If x belongs to {- 1,1,2, the square of X - 2x}, then the set of real numbers x is

RELATED INFORMATIONS

• 1. Seven letter English words Guess a word. The last two of the seven letters are bound vernacular, er wa Please answer
• 2. In Grade 9, complete 7 sentences according to the initial 1.It's n____ for us to learn knowledge as much as possible. 2.They are going to p____ their piano concert tonight. 3.At last,they s____ in finishing that hard work. 4.This restaurant is too small to s___ so many people.Let 's go to another one. 5.Liu Xiang's success is an i___ to us all. 6.Whenever I am in trouble,my friend Mary always o___ to help. 7.The fire began at eight and soon it was out of _____ (control) Answer as many as you can
• 3. An English word has seven letters and the third letter is L
• 4. What is the last word of a seven letter English word, P?
• 5. The last seven letter English word is r
• 6. A word that can describe a dog and the penultimate letter is r,
• 7. E h add another two letters to change into another word
• 8. S starts with H and ends with seven letters. The last three letter is e
• 9. What are the seven letter st words? The fourth letter is D and the last letter is t
• 10. A seven letter word that starts with P and ends with S
• 11. Choose the appropriate method to represent the following set: (1) the set composed of all real number roots of the equation x (x2-2x-3) = 0; (2) rational numbers greater than 2 and less than 6; (3) the set composed of points on the line y = - x + 4 whose abscissa and ordinate are natural numbers
• 12. Use enumeration to represent the following set: the square of equation x is equal to the square of X, so why is there no negative one in the set of real number roots It turns out that the square of X is in brackets
• 13. A set of all real roots of the equation x (x ^ 2-2x-3) = 0 How can I solve this equation?
• 14. Is the true number in logarithmic function a positive real number that is not 1?
• 15. It is proved that if a and B are nonnegative real numbers, then a + B + 2 ≥ 2 (√ a + b)
• 16. Let P and Q be two nonempty sets of real numbers. Define the set P · q = {z1z = AB, a belongs to P, B belongs to Q} If P = {- 1,0,1}, q = {- 2,2}, then the elements in the set P · Q are?
• 17. Let P and Q be two nonempty sets of real numbers. Define the set M = P + q = {a + B | a ∈ P, B ∈ Q}. If P = {0,2,5}, q = {1,2,6}, what is the number of subsets of M
• 18. Given the set a = {x | x ≥ 4}, the domain of G (x) = 1 / √ 1-x + A is B. If a ∩ B = empty set;, what is the range of real number a?
• 19. Let P and Q be two nonempty sets of real numbers, and define the set P + q = {a + B | a ∈ P, B ∈ Q}. If P = {0, 2, 5}, q = {1, 2, 6}, then the number of elements in P + Q is () A. 6B. 7C. 8D. 9
• 20. It is known that the definition field of function y = LG (4-x) is a, and set B = {x | x ＜ a}. If P: "x ∈ a" is a sufficient and unnecessary condition of Q: "x ∈ B", then the real number a Why is it greater than 4 instead of less than 4? Isn't the sufficient and unnecessary condition that a can deduce B, but B can't deduce a