高中数学高手(最好是学竞赛的或老师)详解!f(x)=x^2+2mx+3m+4有两个零点且比-1大,求m的范围.1:考虑b^2-4ac>0 2:考虑(x1+1)+(x2+1)>0 (x1+1)(x2+1)>03:考虑对称轴>-1 4:考虑f(-1)>0 哪些是多余的考虑,重要的
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 04:41:05
![高中数学高手(最好是学竞赛的或老师)详解!f(x)=x^2+2mx+3m+4有两个零点且比-1大,求m的范围.1:考虑b^2-4ac>0 2:考虑(x1+1)+(x2+1)>0 (x1+1)(x2+1)>03:考虑对称轴>-1 4:考虑f(-1)>0 哪些是多余的考虑,重要的](/uploads/image/z/2567994-42-4.jpg?t=%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E9%AB%98%E6%89%8B%EF%BC%88%E6%9C%80%E5%A5%BD%E6%98%AF%E5%AD%A6%E7%AB%9E%E8%B5%9B%E7%9A%84%E6%88%96%E8%80%81%E5%B8%88%EF%BC%89%E8%AF%A6%E8%A7%A3%21f%28x%29%3Dx%5E2%2B2mx%2B3m%2B4%E6%9C%89%E4%B8%A4%E4%B8%AA%E9%9B%B6%E7%82%B9%E4%B8%94%E6%AF%94-1%E5%A4%A7%2C%E6%B1%82m%E7%9A%84%E8%8C%83%E5%9B%B4.1%EF%BC%9A%E8%80%83%E8%99%91b%5E2-4ac%3E0+2%3A%E8%80%83%E8%99%91%28x1%2B1%29%2B%28x2%2B1%29%3E0+%28x1%2B1%29%28x2%2B1%29%3E03%3A%E8%80%83%E8%99%91%E5%AF%B9%E7%A7%B0%E8%BD%B4%3E-1+4%3A%E8%80%83%E8%99%91f%28-1%29%3E0+%E5%93%AA%E4%BA%9B%E6%98%AF%E5%A4%9A%E4%BD%99%E7%9A%84%E8%80%83%E8%99%91%2C%E9%87%8D%E8%A6%81%E7%9A%84)
xRN@AJVSH>#!a!>+~1a{=sfԑ9"c<7ۥBtwVn hLDyrvRK{lH
K)s1Il#1j,۽sЅKXFImeR