What are the methods of solving various inequalities in high school concrete

Comparison method: comparison method is one of the most basic and important methods to prove inequality. It is the direct application of the size order and operation property of two real numbers. Comparison method can be divided into difference comparison method (referred to as difference method) and quotient comparison method (referred to as quotient method)

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1. How to solve an inequality problem A. B is known to be a real number A & # 178; + B & # 178; + 5 ≥ 2 (2a-b) is an inequality, right
2. Simple mathematical problems (Solving inequalities) Half x is greater than one third X
3. Elementary two simple mathematical problems -- solving inequality system Please help me. Thank you~ Find the solution set of the following inequality ① -1≤x≤1 ② (x-2)²>(x+3)(x-3) Need process thank you need process thank you need process thank you need process thank you need process thank you~
4. Solve the following system of inequalities 1) 1＜(2X-5)÷3＜3 [X-(2÷3)]+5≥2X-(3÷2) 2) The equation about X when k is a value 3K(X+2)+2=5X=8 The solution is not greater than 3? 2) The equation about X when k is a value 3K(X+2)+2=5X+8 The solution is not greater than 3?
5. (2/x)-(2/x-1)>0
6. 2X^4-x^2-6>0
7. Specific velocity! Solve the following inequality (with process) 1.x-1/x+2>0 2.2x-4/x+3
8. Master into, computing, solving equations, solving inequalities, to process, fast ah, speed The solution set of inequality system x + (2x-1) > 1 3x-1 > x + 2 is________ Calculation: (- 1 and 1 / 2 - 1 / 3 + 2 and 5 / 6) * - 12 Solution equation: (1-x) - X / 2 = x - (x-1 / 3 + 1) Solving the system of inequalities: 5 (x + 1) ＜ X-1, (5x-1) / 2 ＜ (11x + 1) / 4 + 3 If X-1 = 2, then x=_____
9. Find the solution of two inequalities 1) Let X and y be positive numbers and X + y = 1. Find the minimum value of 1 / x + 2 / Y and point out the value of X and y 2) When x is greater than 0, find the maximum value of 3x / x + 4
10. The speed of solution set of inequality X-2 > 0 In this way, I forgot the previous knowledge
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15. Solution set of inequality 2x-x with square = 0
16. The selling price of a commodity is 150 yuan, and the profit of a commodity sold by the merchant is 10% ~ 20% of the purchase price. What is the range of the purchase price (accurate to 1 yuan) The inequality I listed is that x + x times 10% is less than or equal to 150 I write the second inequality separately. X + x times 20% is greater than or equal to 150 They form a system of inequalities
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