椭圆x^2/25+y^2/16=1上有动点p,F1F2是两个焦点,求△PF1F2重心G的轨迹方程

问题描述:

椭圆x^2/25+y^2/16=1上有动点p,F1F2是两个焦点,求△PF1F2重心G的轨迹方程

G(x,y) P(x0,y0)
x=x0/3
y=y0/3
x0=3x y0=3y
x0^2/25+y0^2/16=1
轨迹方程9x^2/25+9y^2/16=1