已知椭圆E:x^2/2+y^2/4=1的左、右焦点分别是F1,F2,点P为椭圆E第一象限上一点,且满足向量(PF1)点乘向量(PF2)=1.过点P做倾斜角互补的两条直线PA,PB分别交椭圆E于点A,B.(1)求点P坐标；(2)求直线AB斜率；(

已知椭圆E:x^2/2+y^2/4=1的左、右焦点分别是F1,F2,点P为椭圆E第一象限上一点,且满足向量(PF1)点乘向量(PF2)=1.过点P做倾斜角互补的两条直线PA,PB分别交椭圆E于点A,B.(1)求点P坐标；(2)求直线AB斜率；(
已知椭圆E:x^2/2+y^2/4=1的左、右焦点分别是F1,F2,点P为椭圆E第一象限上一点,且满足向量(PF1)点乘向量(PF2)=1.过点P做倾斜角互补的两条直线PA,PB分别交椭圆E于点A,B.
(1)求点P坐标；
(2)求直线AB斜率；
(3)求三角形PAB面积的最大值.

已知椭圆E:x^2/2+y^2/4=1的左、右焦点分别是F1,F2,点P为椭圆E第一象限上一点,且满足向量(PF1)点乘向量(PF2)=1.过点P做倾斜角互补的两条直线PA,PB分别交椭圆E于点A,B.(1)求点P坐标；(2)求直线AB斜率；(
1.设P（x1,y1) 分别表示出向量PF1 PF2,代入可计算得
x1=根6/3 y1=2根6/3
2.设PA y-y1=k(x-x1)
PB y-y1=-k(x-x1)
分别代入椭圆中 可以解出k为变量的A B点坐标
AB的斜率 k0=(y3-y2)/(x3-x2) 代入简化可得k0=1为定值
3.设AB y=x+b
点P到AB的距离 为l
AB长度为根2*(x3-x2)的绝对值
SPAB可表示为b的函数,求此函数的最大值即可.
计算过程太繁琐,就不列了.

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yesterday, the defendant was charged with intentional homicide Wenjie, one hospital in the trial.
feel degrading face, then a dispute with each other.
prosecution allegations, January 1,...

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yesterday, the defendant was charged with intentional homicide Wenjie, one hospital in the trial.
feel degrading face, then a dispute with each other.
prosecution allegations, January 1, 2007 0 pm, the defendant in the Haidian District, Shue Wenjie near a cottage, and then because of a trivial dispute over 28-year-old Mr. Kwak, who then iron Kwak hammer hit the head, causing severe head injury Kwak. Later, Zhang Wenjie's body will be buried in the house Kwak tracks. Until May 2010, after the incident of the sublease the second cottage renovation, construction workers found under the tiles remains Kwak.
the prosecution that the crime of murder should be investigated for criminal responsibility Zhang Wenjie.
families of those killed several hundred thousand dollars in civil damages.
this, Zhang Wenjie pleaded guilty. The lawyer said that his family farm home because the defendant Zhang Wenjie, the two sides on the divergence in the amount of compensation.
The case is still pending.
■ case playback

urge somebody to lead New Year's Day massacre

Zhang Wenjie said the accused, December 31, 2006 - the day before the incident, victims Kwak submitted to want to go home to prepare for the New Year. Taking into account the next day is New Year's Day, he gave the $ 1,000 settlement Kwak wages.
10 o'clock that night,nike mercurial vapor, Zhang Wenjie and Mr. Kwak, who along with drinking. During the meeting, urging people to drink due to a conflict, Zhang Wenjie holding a hammer blow Kwak death.
Zhang Wenjie said the incident occurred outside is snow because he feared the blood drops on the road will lead to trouble, so he used a screwdriver to pry tile house is being renovated, dug in the room a one-meter deep hole, buried the body Kwak,nike mercurial, and finally turn up on the tile. Later, he committed the crime hammer clean-up, and get other sites to use.
■ Interrupted

farmers, and has one daughter. However, only a three acre and more, for 2006 Mid-Autumn Festival, her husband go out to work. December 22 that year, Mr. Kwak specifically to hit a home phone,adidas predator, promised to go home early for the New Year.
husband received a phone call, until the New Year, and her husband not to go back. Liu Kwak phone call, you can no longer connect.
Liu said, more than three years later, her husband may go to work in Jiangsu and other sites, looking for her husband while working side of the Trustee, but no news. During which they have repeatedly found Zhang Wenjie home, but the other has said Kwak picking up wages and then leave. Until after the incident, Zhang Wenjie know Mr. Kwak was killed.

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