Given the function f (x) = - x2 + ax + b2-b + 1, (a, B ∈ R), f (1-x) = f (1 + x) holds for any real number X. if f (x) > 0 holds for X ∈ [- 1, 1], then the value range of B is () A. - 1 < B < 0b. B > 2C. B > 2 or B < - 1D. B < - 1

Given the function f (x) = - x2 + ax + b2-b + 1, (a, B ∈ R), f (1-x) = f (1 + x) holds for any real number X. if f (x) > 0 holds for X ∈ [- 1, 1], then the value range of B is () A. - 1 < B < 0b. B > 2C. B > 2 or B < - 1D. B < - 1


∵ for any real number x, f (1-x) = f (1 + x) holds, the axis of symmetry of function f (x) is x = 1 = A2, the solution is a = 2, the axis of symmetry of function f (x) is x = 1, the opening is downward, the function f (x) is monotone increasing function on [- 1, 1], and f (x) > 0 holds, f (x) min = f (- 1) = b2-b-2 > 0, the solution is B < - 1 or b > 2, so choose C



Mathematical solution to quadratic inequality of one variable
The following univariate quadratic inequalities are solved and the solution set is represented by interval
(1) The square of 5 + 4x-x is more than 0;
(2) The square of 2x + 3x + 10


(1)5+4x-x^2>0;
x^2-4x-5



Find the solution of the inequality M2X + 2 > 2mx + m about X


The original inequality can be changed into: m (m-2) x > m-2 (1) when m-2 > 0 is m > 2, MX > 1, the solution of the inequality is x > 1m (2) when m-2 < 0 is m < 2, MX < 1. ① when m < 0 is m < 2, the solution of the inequality is x < 1m; ② when m < 0, the solution of the inequality is x > 1m; ③ when m = 0, the solution of the inequality is all real numbers. (3) when m-2 = 0 is m = 2, the inequality has no solution When m > 2, the solution of the inequality is x > 1m; when 0 < m < 2, the solution of the inequality is x < 1m; when m = 0, the solution of the inequality is all real numbers; when m = 2, the inequality has no solution



M is a real number, solve the inequality about X: m ^ 2x ^ 2 + 2mx-3 > 0


M^2X^2+2MX-3>0
M = 0, no solution
M^2>0
4M^2+12m^2=16m^2>0
m> 0, the solution of the inequality is
x1/m
m