(2 places 1u? Changchun simulation) As shown in Figure 8, in the plane rectangular coordinate system, point A is on the positive semi-axis of Y axis, point B is in the first quadrant, and the coordina

(2 places 1u? Changchun simulation) As shown in Figure 8, in the plane rectangular coordinate system, point A is on the positive semi-axis of Y axis, point B is in the first quadrant, and the coordinate of point C is (4, ground. Solution: (n) According to the meaning of the question, ten (8,8), c (3 3,0), then

4a+8 ten +8 = 89a+3 ten +8 = 0.

Get a =? 83 ten = 43.

(8) According to (n), the parabola passing through a, x and c is u =? 83x8+43x+8。

So the coordinate of vertex G is (n, 83).

X graph, if point G is GH⊥A and point H is ten, then AH= ten H=n, GH=83? 8=83.

If you make ten M⊥OC at point M after ten, then quadrilateral A and ten MO are both squares.

Ten A= ten m.

∠∠A ten M=∠E ten f = 90,

E ten m = F ten a.

∠∠Ten ME =∠Ten AF = 90，

∴ In △E ten m and △F ten a, ∠ e ten m = ∠ f ten a ∠ ten me = ∠ ten af = 90 ten m = ten a.

∴△E Ten M△ F Ten a (AAS).

∴EM=AF.

∵ Tan ∠ A ten F=AFA ten = praised and trampled. What's your comment on this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Law Professional Edition. Other similar problems 2014-12-10 (2014? Changchun) As shown in the figure, in the plane rectangular coordinate system, point A is in the second quadrant, and the parabola with vertex passes through the origin and intersects with the negative half axis of X axis at point 882017-12-15 (2013? Jiangxi simulation) As shown in the figure, in the plane rectangular coordinate system, O is the coordinate origin, the quadrilateral OABC is a rectangle, and the coordinates of point A and point C are A (1017-12-15 (20/kloc-0) respectively. Daqing) as shown in the figure, in the plane rectangular coordinate system xOy, the image of the linear function y=ax+b intersects with the X axis at point A (-2,0) and with the Y axis at point 382016-12-01(2014. As shown in the figure, on the plane rectangular coordinate system, the vertices A and C of △ABC are on the positive semi-axis of X axis and Y axis, respectively, and AB∨Y axis, AB =114-11-05 (20655 In the plane rectangular coordinate system, the coordinates of vertex C of rhombic ABCD are (-1 0), and the coordinates of point B are (0,2), 720 16-05-27(20 13? Changchun simulation) as shown in the figure, in the plane rectangular coordinate system, point D is on the image of the first quadrant of the inverse proportional function y = kx, and the positive semi-axis of DA perpendicular to the X axis is 520 16-06-30(20 14? Changchun simulation) As shown in the figure, in the plane rectangular coordinate system, the point P (? 12, a) between the straight line y=2x+2 and the straight line y=2x+4, then the value norm of a is recommended to you: F.context('cmsRight', [{'URL':'/d 01373f082025aaf5/kloc-0. x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '， ' contractId':'A24KA00562 '，}，{ ' URL ':/builder/bjh-activity/articlesTask？ taskId = 1598082 & aside = 0 & footer = true & from = 0 '，' src ':'/203 FB 80 e 7 bec 54 e 773 ea 0680 ab 389 b 504 fc 26 a2d？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； Why is the cost of cancer treatment getting higher and higher? The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 17206395 18；