The positions of known numbers a, B and C on the number axis are as follows: C < a < 0 < B simplify | a + B | - | c-b|

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• 1. It is known that f (x) = ax ^ 3 + BX ^ 2 + CX (a is not equal to 0) obtains the extremum when x = ± 1, and f (1) = - 1,1) tries to find the value of constant ABC It is known that f (x) = ax ^ 3 + BX ^ 2 + CX (a is not equal to 0) obtains the extremum when x = ± 1, and f (1) = - 1,1) tries to find the value of constant ABC; 2) tries to judge whether the function obtains the minimum or maximum when x = ± 1, and explains the reason
• 2. The product of the sum of two continuous natural numbers multiplied by their difference is 99. The larger of the two natural numbers is () Let's set the maximum number to X and solve the equation
• 3. The product of two adjacent natural numbers is 99. What are the two numbers
• 4. The product of the sum of two continuous natural numbers multiplied by their difference is 99. The larger of the two natural numbers is 99______ ．
• 5. If the sum of two natural numbers is 14 and their product is 48, then the two numbers are, Lie equation
• 6. What is the rule of the product of two adjacent natural numbers What's the rule of the product of two adjacent natural numbers?
• 7. Divide the natural numbers 1-200 into three groups a, B and C according to the following method: a (1, 6, 7, 12, 13, 18...) B (2, 5, 8, 11, 14, 17...) C (3,4,9,10,15,16...) how many numbers are there in each group? What is the last number in each group? Which group is 173?
• 8. If 16 is divided into the sum of several natural numbers, what is the maximum product of these natural numbers?
• 9. Divide 16 into three natural numbers to make the product of these three numbers the largest, the largest is () Calculate by equation Urgent!
• 10. What is the maximum product of dividing 16 into several natural numbers
• 11. It is known that the domain of definition of function f (x) is (- 5,5) and satisfies the following conditions: F (x) is an odd function, (2) f (x) decreases monotonically on the domain of definition, (3) f (1-A) + F (2a-5)
• 12. After a decimal and its own addition, subtraction and division, the sum of sum and difference quotient is 10.4. What is the original decimal?
• 13. Monotone interval of function y = LG (1 + x) + LG (1-x)
• 14. The following statement is correct () A. When two numbers are added, the sum is greater than any addend B. when two numbers with different signs are added, the sum is less than any addend C. when two numbers with equal absolute value are added, the sum must be equal to zero D. when two numbers are added, the sign of the larger addend is taken as the sign of the result
• 15. The following calculation is correct: A: 3Y / X △ 3xy = x ^ 2 B: 3Y / x ^ 2 △ X / 3Y = 1 / X C: X △ y * 1 / y = x D: A / A ^ 2-1 * A-1 / a = 1 / A + 1
• 16. Let f (x) defined on R satisfy f (x + y) = f (X-Y) = 2F (x) f (y) and f (π / 2) = 0 for any x, y ∈ R If f (0) ≠ 0, try to find f (π), Get rid of talking in detail. If I speak well, I will understand it after reading it once or twice. I will add at least 50 points Let f (x) defined on R satisfy f (x + y) + F (X-Y) = 2F (x) f (y) and f (π / 2) = 0 for any x, y ∈ R, If f (0) ≠ 0, try to find f (π), There's a little mistake on it. It's not an equal sign, it's a plus sign. I understand it after one or two times. I'll add at least 50 points
• 17. If FX = 1 / 3x ^ 3-F (1) x ^ 2 + 2x + 5, then f (2)?
• 18. On the slope of a straight line If the slope of a straight line is less than - 1, why is the range of inclination angle not 90 to 135? Is it 90 to 135 or 135 to 180? The college entrance examination will be held tomorrow
• 19. How to solve x-0.36x = 16 X-0.36X=16 X-0.36X=16 How does (1-0.36) x = 16 (the "1" in this place) increase 0.64x=16 x=25
• 20. Find the slope, inclination angle and intercept on the Y-axis of the following line 1.2x + y + 3 = 0.2.x5-y4 = 0.3.x-2y = 0.4.x = y