The function y = - x ^ 2 + 6x + 9 is in the interval [A.B] (A

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• 1. If the function y = - x + 6x + 9 has a maximum value of 9 and a minimum value of - 7 in the interval [a, b] (a < B < 3), then a =?, B =?
• 2. Find the maximum and minimum value of function f (x) in the interval [- π / 4, π / 4] f（x）=sin（2x+π/3）+sin（2x-π/3）+2cos²x-1，x∈R
• 3. (x / x2-9) - (1 / x2 + 6x + 9) calculation
• 4. [compare the size of X2 (square of x) - 4x + 3 and X2 (square of x) - 6x + 9] Compare the size of x2-4x + 3 and x2-6x + 9
• 5. X2-6x + 9-y2~~
• 6. x2-y2-6x+9
• 7. Finding the minimum value of Y & # 178; + 4Y + 8 Read the process below Solution: Y & # 178; + 4Y + 8 = y & # 178; + 4Y + 4 + 4 = (y + 2) &# 178; + 4 ≥ 4 The minimum value of Y & # 178; + 4Y + 8 is four The minimum value of a & # 178; + A + 1 can be obtained by imitating it
• 8. Read the following solution process, find the minimum value of Y square + 4Y + 8. Solution: y square + 4Y + 8 = y square + 4Y + 4 + 4 = (y + 2) square + 4 ≥ 4, so the minimum value of Y square + 4Y + 8 is 4. Follow the above solution process, find the minimum value of m square + m + 1 and the maximum value of 4 - (x square) + 2x ~ ~ ~ urgent, everyone help me
• 9. Read the following questions and their solutions: find the minimum value of Y & # 178; + 4Y + 8 Solution: Y & # 178; + 4Y + 8 = y & # 178; + 4Y + 4 + 4 = (y + 2) &# 178; + 4 ≥ 4, so the minimum value of Y & # 178; + 4Y + 8 is 4. Follow the above solution process to find the minimum value of M & # 178; + m + 1
• 10. Y & # 178; + 4Y + 8 = y & # 178; + 4Y + 4 + 4 = (y + 2) & # 178; + 4 ≥ 4, so the minimum value of Y & # 178; + 4Y + 8 is the minimum value of M & # 178; + m + 4
• 11. The function f (x) = - x ^ 2-6x + 9 in the interval a, B, (a)
• 12. Find the maximum and minimum value of the function y = x2 + 6x-7 in the interval [- 8,3]
• 13. The function y = - X & # 178; + 6x + 9 is in the interval [A.B] (A
• 14. What is the factorization of the square of a + AB?
• 15. Factorization of a ^ 2-5ab-24b ^ 2
• 16. Factorization a ^ 2 + 6B ^ 2-5ab-2ac + 6BC Ask for detailed explanation
• 17. Image and properties of exponential function If the image of function f (x) = X-1 power of a + 3 (a > 0 and a ≠ 1) passes through the fixed point P, try to find the coordinates of point P
• 18. Y = a ^ x... When 0 < a < 1, the image of a starts from the second quadrant to the first quadrant? On the contrary, when a > 1, the image of a starts from the first quadrant to the second quadrant? Then what do you think of X?
• 19. Image of function f (x) = 4x + 12x () A. On origin symmetry B. on line y = x symmetry C. on X-axis symmetry D. on Y-axis symmetry
• 20. How to prove the monotonicity of exponential function with the definition of monotonicity