Simple mathematical problems (Solving inequalities) Half x is greater than one third X

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• 1. 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~
• 2. 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?
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• 5. Specific velocity! Solve the following inequality (with process) 1.x-1/x+2>0 2.2x-4/x+3
• 6. 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=_____
• 7. 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
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• 11. 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
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• 13. If a ＞ B ＞ C, n ∈ n *, and 1a − B + 1b − C ≥ Na − C holds, then the maximum value of n is______ ．
• 14. Two simple high school inequality questions ~ speed 1. Proof: the square of a + the square of B ≥ AB + A + B-1 2. Verification: 2 (radical (n + 1) - 1) < 1 + 1 / (radical 2) + 1 / (radical 3) + +1 / (radical n) < 2 (radical n)
• 15. |X ^ 2-2x | < 3 this is a problem of inequality in senior high school You can see it
• 16. The solution set of inequality (xsquare-2x-3) (x + 1) 0 is
• 17. Solution set of inequality 2x-x with square = 0
• 18. 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
• 19. Solving inequality system (solving method, process, format) 5x+6>4x 15-9x5x+1 11-2x
• 20. The maximum value of basic inequality a,b＞0.ab≥1+a+b Find the minimum of a + B?