C为以(-3,0),(3,0)为焦点,长轴为10的椭圆a = 10/2 = 5c = 3,b = 4椭圆:x²/25 + y²/16 = 1直线:y = (4/5)(x - 3)代入椭圆方程,整理得:x² - 3x - 8 = 0x₁ + x₂ = 3,x₁x₂ = -8...