已知直线y=kx+3与椭圆x2/9+y2/4=1有公共点,试确定k的取值范围
问题描述:
已知直线y=kx+3与椭圆x2/9+y2/4=1有公共点,试确定k的取值范围
答
∵ 直线y=kx+3与椭圆x2/9+y2/4=1有公共点∴ 方程组:y=kx+3····································(1)x2/9+y2/4=1····························...