The opening direction and shape of quadratic function image and parabola y = - 2x ^ 2 are the same, x = 1, and the minimum value is - 1

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• 1. What is the a value of quadratic function with the same image shape as function y = - x?
• 2. In quadratic function, if two parabolas have the same shape, is a the same, or is the absolute value of a the same? In other words, the same shape, the same opening direction?
• 3. Properties and applications of quadratic function
• 4. Is the same shape of two quadratic functions the same a value?
• 5. What can be explained by the same shape of quadratic function image The shape of y = ax ^ 2 + BX + C is the same as that of y = - x ^ 2-7x + 12, the symmetry axis is x = 1, and the distance from the vertex to the X axis is the root sign 3
• 6. Image shape of quadratic function What does the shape of the image of quadratic function have to do with? y=ax^2+bx+c
• 7. Induction: image and properties of quadratic function y = a (x + H) ² + k
• 8. Why is the vertex formula of quadratic function p (h, K)]: y = a (X-H) ^ 2 + k How did it come out?
• 9. Is there a better introduction to the image and properties of quadratic function y = a (X-H) 2K
• 10. The analytic expression of quadratic function is y = a (x + H) ^ 2 + K or y = a (X-H) ^ 2 + K
• 11. It is known that the coefficients a, B and C of quadratic function y = ax ^ + BX + C are integers, and when x = 19 or x = 99, y = 1999, | C|
• 12. The intersection of the image of the quadratic function y = - x ^ 2 / 2 + X + 4 and the X axis is a and B from left to right, the intersection with the Y axis is C, and the vertex is d 1. Finding the area of quadrilateral abdc 2. Find a point d 'on the parabola in the first quadrant to maximize the area of quad abd'c
• 13. The quadratic function of higher one, the method to find the range of Y and the maximum value Y = x + √ 1-x, the value range of Y Y = x ^ 2 + √ 1-x ^ 2, find the value range of Y In y = 1 / √ ax ^ 2-ax + 1, X can take all real numbers and find the value range of A Let y = 4x ^ 2-4ax + A ^ 2-2a + 2, find the minimum value of y when x is less than or equal to 2 and greater than or equal to 0
• 14. Want to ask a high school mathematics about "the maximum value problem of quadratic function on closed interval" The problem is: find the maximum value of function y = x square - 2aX - 1 on [0,2] guys. I'm not good at math. I can't draw inferences from one instance~
• 15. The maximum value of quadratic function in closed interval Y = T ^ 2-2t + 3 - 1 / 4 ≤ t ≤ 2 find the maximum and minimum of Y
• 16. On the maximum value estimation of quadratic function on closed interval
• 17. A problem on the maximum value of closed interval of quadratic function I know that there are three possibilities, but when a ≤ 1 ≤ B, how can I judge whether to take a or B as the minimum? I see a solution (3) a
• 18. The application of quadratic function in interval problem It is known that f (x) = - 3x & # 178; + 6x + 1 1. When x belongs to R, find the range of F (x) 2. When x belongs to [- 2.0], find the range of F (x) 3. If x belongs to [0.3], find the range of F (x)
• 19. A problem of quadratic function in junior high school Yingxian bridge, rebuilt in 1844, is located on the ancient trunk road between Zhejiang and Fujian. According to taoshuwu village, 15km southeast of Xinchang County, the bridge is a single hole parabolic stone arch bridge with smooth arch. The span and height of the arch are known to be 15.6m and 7.7m respectively. An appropriate plane rectangular coordinate system is established and the quadratic function relationship corresponding to the parabola is obtained
• 20. Give a typical example of classification discussion of quadratic function in Senior High School To solve the process This is too simple, isn't it~~~~~~