2X square + 3x-2 = 0 (x is an integer)

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• 2. The reason why the equation x + 3 = 1-2x can be transformed into x + 2x = 1-3 is that______ ．
• 3. 2X + 3 = 3x + 2 solution: 2x-2 = 3x-3 Deformation basis (?)?
• 4. Limx - > 1 (1 / x) = 1 prove limit by definition |1/x-1|
• 5. Prove limx - > 1 (x-1) / (√ X-1 = 2) with the definition of function limit Prove with the definition of function lim x->1 （x-1）/ （√x -1）=2
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• 9. The limit value limx tends to be 1, ((1 / 1-x) - (3 / 1-x ^ 3)) =LIM (1 + X + x ^ 2-3) / (1-x ^ 3) general division =lim (x^2+x-2)/(1-x^3) =lim (x-1)(x+2)/(1-x^3) =-lim (x+2)/(1+x+x^2) =-3/3 =-1 Why is it that the denominator tends to zero?
• 10. Find limit limx →∞ √ (x ^ 3 + x) - (√ x)
• 11. It is known that the center of circle C and point P (- 2,1) are symmetric with respect to the line y = x + 1. The line 3x + 4y-11 = 0 intersects circle C at two points a and B, and | ab | = 6, then the equation of circle C is______ ．
• 12. When Xiao Li solved the equation 5a-x = - 8-4x + 3A about X, he mistook the left-x as + X, and got the solution of the equation as x = - 2 to solve the original equation Thank you. I can do it. It's just the first time I try Baidu
• 13. Given that two of the equations 4x & # 178; - 7x-3 = 0 are X1 and X2, then 2 / X1 + 2 / x2 =, (x1-x2) is the absolute value of X1 & # 178; + x2 & # 178; =?, Given that two of the equations 4x & # 178; - 7x-3 = 0 are X1 and X2, then 2 / X1 + 2 / x2 =, (x1-x2) is the absolute value of X1 & # 178; + x2 & # 178; =?,
• 14. Given that M is not equal to 3, what is the solution of the equation MX - 3 = 3x?
• 15. Given the complete set a = {1,2,3,4,5,6,7,8,9}, anb = {2}, (CUA) n (cub) = {1,9}, (CUA) NB = {4,6,8}, determine a, B Sorry, wrong number. It's the complete U
• 16. Let u = {positive integer no more than 5}, a = {x | x2-5x + q = 0}, B = {x | x2 + PX + 12 = 0}, (∁ UA) ∪ B = {1, 3, 4, 5}, find P, Q and set a, B
• 17. Let u = {positive integer no more than 5}, a = {x | x ^ 2-5x + q = 0}, B = {x | x ^ 2 + PX + 12 = 0}, (CUA) UB = {1,3,4,5}. Find P, Q, AUB I just learned the basic operation of set. The teacher left this question as a thinking question. I've read your explanation, but I still don't quite understand it
• 18. Solving a mathematical problem about proposition and proof The following is the definition of "mysterious number": a positive integer that can be expressed as the square difference of two consecutive even numbers is called a mysterious number. Please judge 4, 12, 20, 28, 2012 as a mysterious number according to the definition of "mysterious number". Why?
• 19. To solve the equations: {5x-4y = 12} {3x-y = 7}
• 20. X2 + y2 = (x + y) 2 + P = (X-Y) 2 + Q, then p=______ ，Q=______ ．