开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1,3),则m=
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 14:07:25
![开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1,3),则m=](/uploads/image/z/5249296-64-6.jpg?t=%E5%BC%80%E5%8F%A3%E5%90%91%E4%B8%8B%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D%28m%26%23178%3B-2%29x%26%23178%3B%2B2mx%2B1%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4%E7%BB%8F%E8%BF%87%E7%82%B9%EF%BC%88-1%2C3%EF%BC%89%2C%E5%88%99m%3D)
x){i&>|V˳;W>ߵV#WMZH6ʭ6z~^|wϛvӡkc~Oӎ6IE43[Ά.5Տ6ȍ3kk}|}smuL
=t';v!FYgÓKm@n WTi
开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1,3),则m=
开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1,3),则m=
开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1,3),则m=
-2m/[2(m^2-2)]=-1
解得m=2或-1
有因为开口向下,所以m^2-2