已知函数y=(k2+4k-5)*x2+4(1-k)*x+3的图像上的点都在X轴上方,求实数k的取值范围*代表乘,x2代表x平方.请有尽可能完整的过程/思路,不然我看不懂!
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![已知函数y=(k2+4k-5)*x2+4(1-k)*x+3的图像上的点都在X轴上方,求实数k的取值范围*代表乘,x2代表x平方.请有尽可能完整的过程/思路,不然我看不懂!](/uploads/image/z/4109460-60-0.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0y%3D%28k2%2B4k-5%29%2Ax2%2B4%281-k%29%2Ax%2B3%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8A%E7%9A%84%E7%82%B9%E9%83%BD%E5%9C%A8X%E8%BD%B4%E4%B8%8A%E6%96%B9%2C%E6%B1%82%E5%AE%9E%E6%95%B0k%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%2A%E4%BB%A3%E8%A1%A8%E4%B9%98%2Cx2%E4%BB%A3%E8%A1%A8x%E5%B9%B3%E6%96%B9.%E8%AF%B7%E6%9C%89%E5%B0%BD%E5%8F%AF%E8%83%BD%E5%AE%8C%E6%95%B4%E7%9A%84%E8%BF%87%E7%A8%8B%2F%E6%80%9D%E8%B7%AF%2C%E4%B8%8D%E7%84%B6%E6%88%91%E7%9C%8B%E4%B8%8D%E6%87%82%21)
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