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20 15 mathematical model of putuo district ii
Solution: (1) is obtained from y2=4x, and p=2, so f (1, 0), k=0? 2 1? 0=-2,

So k =-2...(3 points)

(2) When k=- 1, d=( 1, k)=( 1,-1), the straight line L: Y =-X+2...(4 points).

The equations of line L and curve γ are sorted by elimination at the same time, x2-8x+4=0, where △ > 0 … (6 points).

Let A(x 1, y 1) and B(x2, y2), then x 1+x2=8, x 1x2=4…(7 points).

So | ab | =1+k2 | x1-x2 | = 46 ... (9 points)

(3) Suppose there is such a real number a that the symmetrical point Q(x0, y0) of the point P(a, 0) with respect to the straight line L falls on the quasi-line of the curve γ,

According to the meaning of the question, k > 0 can be obtained, so the straight line l: y = kx+2, because k > 0,

The equation of straight line L and curve γ eliminates Y at the same time, and it is concluded that k2x2+4(k- 1)x+4=0.

The straight line L and the curve γ have one thing in common, so △ =16 (k-1) 2-16k2 ≥ 0, and the solution is k≤ 12, so 0 < k≤12 .. (65433

Point P(a, 0) is about the symmetrical point Q(x0, y0) of the straight line L, so y02 = k? x0+a2+2y0x0? a=? 1k…( 12 points)

X0=a( 1? K2 has been praised and trampled. What's your comment on this answer? Put away the comments and recommend lawyer services: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Legal Pro. If other similar problems 2011-02-18 cross point p (0,2), take d=( 1, a) as the direction vector, and the straight line L and hyperbola 3x2-. 142011-03-08 known curve C: x 2+y 2-4mx+2my+20m-20 = 0. It is proved that no matter what value M takes, curve C will pass through a certain point 3 12022-65438. Let the image of the linear function y=- 1/2x+2 be a straight line l from August -0 1 2022. The l and x axes intersect at point a and point b respectively. Find tan∠BAO20 13-06-22 as shown in figure 1, hyperbola Y = m. 2). The straight line L and hyperbola 3x2-y2 =1... 202/with d=( 1, a) as the direction vector. More similar questions? & gt recommended for you: F.context('cmsRight', [{'URL':'/d01373f082025aaf511aa256e9edab64034f1a07? 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 ':/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 ':' ',}]); Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? What impact will the "network toilet" have? The price of electric cars has dropped many times. Is the quality guaranteed? 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 = 1720093298;