A + B = - 2 find the maximum value of ab Using inequality

RELATED INFORMATIONS

• 1. Senior high school mathematical inequality proof: when a > 0, b > 0, 1 / AB + 1 / a (a-b) > = 4 / A ^ 2
• 2. Analysis and synthesis to prove inequality If positive numbers a and B satisfy AB = a + B + 3, then the value range of AB is?
• 3. The proof of inequality in the second year of senior high school This is a thinking problem in my homework It is known that a > b > 0 (a-b)^2/8a
• 4. Try to prove the inequality by analysis: (1 + 1 / sin ^ a) (1 + 1 / cos ^ a) > = 9
• 5. Known: 0 〈 a 〈 1, proof: 1 / a 4 / (1-A) greater than or equal to 9
• 6. It is proved that if a, B ∈ R, then at least one of a ^ 2 + AB and B ^ 2 + AB is non negative Good answer points
• 7. a. B is a non negative number √ (1-A ^ 2) √ (1-B ^ 2) = ab
• 8. If a > b > C, a + 2B + 3C = 0, AB > AC and ab
• 9. In space quadrilateral ABCD, ab ⊥ CD, BC ⊥ Da, prove: ab ^ 2 + CD ^ 2 = BC ^ 2 + Da ^ 2
• 10. If two points c and D outside the line BC are known, CA = CB, Da = dB, and the straight line CD intersects AB at O, then point O is the midpoint of AB, and CD is the vertical bisector of ab
• 11. Let f (x) = x2 + BX + 1, and f (- 1) = f (3), then the solution set of F (x) > 0 is () A. （-∞，-1）∪（3，+∞）B. RC. {x∈R|x≠1}D. {x∈R|x=1}
• 12. When a is a value, the solution of the equation a (3x-1) = 4x + 7 is positive, and when a is a value, the solution of the equation is in the interval [- 3,2]?
• 13. A & # 178; + B & # 178; + ab ≥ 0
• 14. In high school inequality, there is a common inequality ab ≤ [(a + b) / 2] &# 178; or ab ≤ (A & # 178; + B & # 178;) / 2 There is a common inequality in senior high school, which is ab ≤ [(a + b) / 2] &# 178; or ab ≤ (A & # 178; + B & # 178;) / 2. Is there any difference between [(a + b) / 2] &# 178; and (a & # 178; + B & # 178;) / 2, or is it equal?
• 15. The solution of inequality is 2 × & # 178; - 3 × - 2 ≤ 1?
• 16. If inequality | X-1|
• 17. Given a / 3 = B / 4 = C / 5, find a & # 178; + B & # 178; + C & # 178; / AB + BC + ca （a²+b²+c²）/（ab+bc+ca）
• 18. A-B = 3, B-C = 2, a & # 178; + B & # 178; + C & # 178; = 1, find the value of AB + BC + ca
• 19. Elementary inequality system or inequality equation of first degree with one variable (the more, the better)
• 20. Solving the inequality of linear equation with one variable The wage is divided into two parts, one is the basic wage of 200 yuan, and the other is the reward of 5 yuan for each garment processed. Worker Xiao Hong hopes that the wage will not be less than 1200 yuan. Then how many garments does Xiao Hong have to process at least one month?