![](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>)
The image of positive scale function passes through points (2, - 4) and makes a vertical line of X axis through a point a on the image. The vertical foot is B (4,0), Finding the coordinates of point a and the area of triangle AOB
The image passing point of positive scale function y = KX (2, - 4) - 4 = 2K k = - 2 y = - 2x
Make a vertical line of X axis through a point a on the image, and the perpendicular foot is B (4,0),
X coordinate of point a 4 y = - 2 * 4 = - 8 coordinate of point a (4. - 8)
The area of triangle AOB s = | 1 / 2 * 4 * (- 8) | = 16
RELATED INFORMATIONS
- 1. The image of a positive scale function passes through a point (- 2,8) and passes through a point a on the image to form a vertical line of y-axis. The vertical foot is B (0,6)
- 2. If the area of the triangle formed by the line y = 2x + B and the coordinate axis is 6, then the analytic expression of the function of the line is
- 3. If the area of the triangle formed by the image of the first-order function y = - 2x + B and the two coordinate axes is 9, then B=______ ．
- 4. If the area of the triangle formed by the line y = - 2x + K and the two axes is 9, then the value of K is () A. 6B. 9C. - 6D. 6 and - 6
- 5. The area of the triangle formed by the image and two coordinate axes of the linear function y = 2x + 3 is ()
- 6. The number of intersections between the image of functions f (x) = 4x-4 (x is less than or equal to 1) and f (x) = x ^ 2-4x + 3 (x > 1) and the image of function g (x) = 1og with the base number of 2x is many What is the number of intersections between the image of functions f (x) = 4x-4 (x is less than or equal to 1) and f (x) = x ^ 2-4x + 3 (x > 1) and the image of function g (x) = 1og whose base is 2x? Three,
- 7. Is even function always symmetric about Y-axis? Why? Is y = f (x + 8) even function, and is the graph drawn symmetric about Y-axis?
- 8. Are the images of odd functions crossing the origin? Do the images of even functions intersect the y-axis
- 9. If the image of function f (x) = ax + 1 / X-1 is symmetric with respect to the line y = x, then a=
- 10. If f (x) = 1 of a + (2 ^ x + 1) is an odd function, then a =?
- 11. The image of the positive ratio function y = x and the image of the inverse ratio function y = x (K ≠ 0) intersect with point a at the first term limit, and make a vertical line of X axis through point a, with the perpendicular foot M
- 12. It is known that the line y = KX + B passes through the point (2.5,0), and the area of the triangle surrounded by the coordinate axis is 6.25. The function analytical formula of the line is obtained
- 13. The area of the triangle formed by the line y = KX + 3 and the two coordinate axes is 9, and the value of K is obtained
- 14. The image of function y = 2Sin (2x + π / 6) can be obtained by which unit the image of function y = 2sin2x is shifted
- 15. The function y = 2Sin (3x + π / 6) image is shifted to the left by π / 6 units, and the function y = 2cos (3x + π / 6) image is obtained. Please explain whether this conclusion is correct
- 16. It is known that Y-3 is in positive proportion to x, and when x = 2, y = 7. (1) translate the function image to pass through the point (2. - 1) to find the analytical expression of the translated line
- 17. It is known that the image of positive ratio function passes (- 4,8) 1) if the points (a, - 1) and (2, - b) are on the image, the values of a and B are obtained
- 18. As shown in the figure, the positive ratio function image passes through point a, and the analytic expression of the function is? Point (1,3) a is connected with point (0,0) as a straight line
- 19. Let f (x) = x-x / 1-alnx, if f (x) has two extreme points x1x2, X1 belongs to the range of (0,1) x2 and (1,2) a
- 20. It is known that f (x) is a decreasing function on a set of real numbers. If a + B ≤ 0, then the following is true? A.f（a）+f（b）≤-{f（a）+f（b）} B.f（a）+f（b）≤f(-a)+f(-b） c.f(a）+f（b）≥-｛f（a）+f（b）｝ d.f（a）+f（b）≥f（-a）+f（-b） 2. Given that f (x) is an odd function, if x > 0, f (x) = X-1, then f (x)