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Function y = x & # 178; + mx-4, when x
y=x²+mx-4
=x^2+mx+m^2/4-4-m^2/4
=(x+m/2)^2-4-m^2/4
Axis of symmetry x = - M / 2
∵a=1>0
The opening of the function is upward, and the left side of the axis of symmetry decreases
When x = 2
m
Parabola y = - 4 (x + 3) ² - 1, when x=__ The function y increases with the increase of X=___ Y decreases with the increase of X
Parabola y = - 4 (x + 3) & # - 1, when x-3_ Y decreases with the increase of X
RELATED INFORMATIONS
- 1. If the image of the first-order function is parallel to the straight line y = - 5x, and the image of the cross inverse scale function y = - 4 / X is at the point (2, m), then M =, the analytic expression of this function is
- 2. The known function is y = (M2-4) x ^ (4 + n) + (m-2), when m=_____ And n=_____ It is a positive proportional function when the value is zero Did the teacher make a mistake
- 3. Given that the function y = (2a + 1) x - (3-B) is a positive proportional function, the value range of a and B is obtained
- 4. A problem about the definition of inverse proportion function If the variable y is positively proportional to X and the variable x is inversely proportional to Z, what is the functional relationship between Y and Z? Online waiting, 4:30 before the answer, urgent! Hurry! Hurry!
- 5. How to find the intersection point of inverse proportion function and positive proportion function
- 6. Calculation and meaning in definition field of high school function It is known that the definition of function y = f (x) is [0,1]. ① find the domain of y = f (X & sup2;) and ② find the domain of function y = f (x / x + 1) When we find ①, we find that the function y = f (X & sup2;) satisfies 0 ≤ X & sup2; ≤ 1, but then how can we get - 1 ≤ x ≤ 1? When we find the function y = f (x / x + 1) satisfies 0 ≤ X / x + 1 ≤ 1, but how can we get x ≥ 0? Sorry, I just began to learn not to understand, hope you teach me
- 7. High school function problem solving function domain Let the domain of function y = f (x) be [- 2,3], then what is the domain of function f (x) = f (x) + F (- x)?
- 8. If f (x) = sin (2x-a) + 1 satisfies f ((π / 3) + x) = f ((π / 3) - x, what is a equal to?
- 9. The ellipse equation is x 2A2 + y 2B2 = 1 (a > b > 0), a vertex is a (0,2), eccentricity e = 63. (1) the equation for solving ellipse; (2) the line L: y = kx-2 The ellipse equation is x2 / A2 + Y2 / B2 = 1 (a > b > 0), a vertex is a (0,2), and the eccentricity e = root 6 / 3 (1) Find the equation of ellipse; (2) The straight line L: y = kx-2 (K ≠ 0) intersects the ellipse at two different points m, n satisfies MP → = PN →, AP → &; Mn → = 0, find K
- 10. If the focus coordinates of the ellipse are (- 5,0) and (5,0), and the sum of the distances between a point on the ellipse and two focuses is 26, then the equation of the ellipse is () A. x2169+y2144=1B. x2144+y2169=1C. x2169+y225=1D. x2144+y225=1
- 11. One of the intersection coordinates of positive scale function y = KY and hyperbola y = 8 / X is a (2, m). (1) find out the coordinate of point a and (2) find out the relation of inverse scale function (3) Find another intersection coordinate of these two function images
- 12. If y is the inverse proportion function of Z, Z is the positive proportion function of X, and X ≠ 0, then what is the functional relationship between Y and X
- 13. When n = 0____ The function y = (n-2) x ^ n-3 is a positive scale function, and the scale coefficient is______
- 14. If y = 3x to the - 2 power, is this a positive proportional function?
- 15. It is known that: three points a (a, 1), B (3, 1), C (6, 0), point a is on the image of positive scale function y = 12x. (1) find the value of a; (2) point P is a moving point on X axis. ① when the sum of △ OAP and △ CBP circumference reaches the minimum, find the coordinates of point p; ② when ∠ APB = 20 °, find the degree of ∠ OAP + ∠ PBC
- 16. Which two points must a positive scale function y = 4x pass through? The image of positive scale function y = 4x must pass through (,) and (,
- 17. Which of the following functions are linear functions and which are positive proportional functions? Y = - 8x y = X-8 y = 5x ^ 2 + 6 y = - 0.5x-1
- 18. If the image of positive scale function y = KX passes through point (2,3), then the value of K is () A. 32B. -32C. 23D. -23
- 19. The image of positive scale function y = KX (k is constant, K < 0) passes through the second step______ Quadrant, function value increases with the increase of independent variable______ ．
- 20. Point a is a point on the image of the inverse scale function. If the area of △ ABO is 2, the solution of the inverse scale function is obtained