If x = 3-5a is inequality 1 / 3 (X-2)

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• 1. Solve inequality 1,3 [X-2 (x-1)] ≤ 4x 2,2-2 of X + 4 > 1-3 of X
• 2. The common point of plane region represented by line 2x + Y-1 = 0 and inequality system {x ≥ 0, y ≥ 0, X-Y ≥ - 2 4x + 3Y ≤ 20 How many common points are there in the plane area
• 3. Find the increasing interval of function y = - (x-3) &; | x | I don't know how to remove the sign of absolute value and divide it into several conditions
• 4. 6 ≥ | X-Y | how to use absolute value sign?
• 5. The length of the major axis of the ellipse C: (x ^ 2) / (a ^ 2) + (y ^ 2) / (b ^ 2) = 1 (a > b > 0) is 4. If the point P is any point on the ellipse C, the line L passing through the origin is equal to the ellipse Intersect at two points m and N. note that the slopes of lines PM and PN are KPM and KPN respectively. When KPM * KPN = - 1 / 4, solve the elliptic equation
• 6. Let a point a (2, - 3), B (- 3, - 2), a straight line L pass through point P (1,1) and intersect with line AB, then the value range of slope k of L is () A. K ≥ 34 or K ≤ - 4B. 34 ≤ K ≤ 4C. - 4 ≤ K ≤ 34d. K ≥ 4 or K ≤ - 34
• 7. If the line L: y = KX + m (k is not equal to 0) intersects the ellipse C: x ^ / 4 + y ^ / 3 = 1 at two different points m and N, and the line segment Mn has a When the vertical bisector passes through the fixed point G (1 / 8, 0), the value range of K is obtained
• 8. Given the value of M (2m + 3, m), n (3m-1,1), the inclination angle of the straight line Mn is a right angle acute angle obtuse angle
• 9. It is known that the line L passes through points a (2,3), B (2m, - 1). When the inclination angle a of the line L is an acute angle, the It is known that the line L passes through points a (2,3), B (2m, - 1). When the inclination angle a of the line L is an acute angle, the value range of M is?
• 10. Given a (- 1, - 5), B (3, - 2), the inclination angle of line L is twice that of line AB, and the slope of line L is calculated
• 11. What is the relationship between "triangle inequality" and "triangle"? What is the geometric meaning of trigonometric inequality? Is it related to triangles? Attachment: trigonometric inequality, ||||||- ||||||||||||||||||||||||||||||
• 12. The convergence of three Cauchy inequalities and mean inequalities 1. Solve the inequality system: y ^ 2-2ax0, note a > 0 (just write down the main process, the result may not be very good) 2 if there is: (x / y ^ 2 + Z ^ 2) + (Y / x ^ 2 + Z ^ 2) + (Z / y ^ 2 + x ^ 2) > = K / radical (x ^ 2 + y ^ 2 + Z ^ 2) Find the maximum value of K (the maximum is (root 27) / 2, how come?) 33 verification: x ^ 2 / y ^ 2 + Z ^ 2 + YZ) + (y ^ 2 / x ^ 2 + Z ^ 2 + XZ) + (Z ^ 2 / y ^ 2 + x ^ 2 + XY) > = 1 (no idea...)
• 13. The absolute value of a times X-1 is greater than 2 + a
• 14. Solving inequality: 5x-6|2x + 1
• 15. X is greater than 0, y is greater than 0, 2x + 5Y = 20, find the minimum value of X / 1 + Y / 1
• 16. It is known that X and y are positive real numbers. (1) proof: 2XY / x + y
• 17. A: If the square of x = 9, then x = 3 and B: 6 are the arithmetic square roots of (- 6). Which is right? I think both of them are right,
• 18. Even function f (x) is an increasing function on [0, positive infinity]. If f (AX + 1) > F (x-3) is constant on X ∈ [1,2], then the value range of real number a is----------------
• 19. It is known that function FX is an odd function defined on R, and f (x + 2) is equal to negative FX. If F1 is equal to 1, then f (3) - f (4)=
• 20. Given the function f (x) = (M + 1) x ^ 2 - (m-1) x + M-1, if M belongs to (- 1,1) inequality and the solution set of F (x) > 0 is r, the value range of X is obtained Please give the detailed process, thank you, this kind of question is a little dizzy, usually is to find the scope of M, thank you!