![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
It is proved that the value of - x ^ 2 + 4x-5 is always less than zero
-x^2+4x-5=-(x^2-4x+4)-1=-(x-2)^2-1,-(x-2)^2
RELATED INFORMATIONS
- 1. It is proved by collocation method that the value of - 4x + 27 is greater than zero and the value of - 6x & # 178; + 24x-25 is less than zero, It must be proved by matching method!
- 2. It is proved that the value of X & # 178; - 4x27 is greater than zero by matching method Solving x square + 2ax-b square + a square = 0 by collocation method If a, B satisfy a ^ B ^ + A ^ + B ^ + 10ab + 16 = 0 Finding the value of a and B
- 3. Prove that the value of 2x ^ 2-6x + 11 is always greater than zero with matching method, and seek its minimum value, please! It is proved that the value of 2x ^ 2-6x + 11 is always greater than zero and its minimum value is obtained by matching method Is constant greater than zero the solution of this equation greater than zero Why am I 13 / 4? 2x^2-6x+11 =x^2-3x+11/2 =x^2-3x+(3/2)^2+11/2-(3/2)^2 =(x-3/2)^2+13/4 That's what I did
- 4. The results show that the value of - 2x & # 178; - 6x + 5 is not more than 19 / 2
- 5. How to solve the problem that minus x square plus 4x equals 3
- 6. How to solve (x + 1) square-2 (x-1) less than or equal to 4x
- 7. Find the square of x value (4x + 1) in the following formula - 1 = 7 / 9
- 8. X ∈ (0,1 / 4), then the maximum value of the square (1-4x) of y = x is-----
- 9. If x.y satisfies x square + y square-4x + 1 = 0, find the maximum value of 3 / x, Y-X minimum value, x square + y square maximum value
- 10. If x is greater than 0, then the maximum value of X squared + 2 / 4x is 0
- 11. It is proved that the square of - x + 6x_ The constant value of 10 is less than zero
- 12. It is proved that: (1) the value of - (x square) + 6x-10 is always less than zero; (2) the value of 4 (x square) - 12x + 10 is always greater than zero
- 13. It is proved that the value of - 3x & # 178; + 12x + 6 is always less than 0 Topics such as questions, the process should be detailed
- 14. It is proved by matching method that no matter what the value of X is, the value of 12x-3x & # 178; - 13X = 0 is always less than 0
- 15. 4X - (the square of x) = 4
- 16. How to do 4x squared (6-x squared) maximum
- 17. Given 4x + 3Y = 2 (x > 0, Y > 0), then the maximum value of XY is equal to
- 18. If the maximum value of the parabola y = - x2 + 4x + k is 3, then K=______ ．
- 19. When x belongs to [0,3], the maximum value of y = minus x squared plus 4x minus 2 is
- 20. Known x