网址:http://m.1010jiajiao.com/timu_id_3731835[举报]
与直线2x-6y+1=0垂直,且与曲线y=x3+3x2-1相切的直线方程是__________.
与直线2x-6y+1=0垂直,且与曲线f(x)=x3+3x2-1相切的直线方程是________.