若开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1.3),则m等于
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![若开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1.3),则m等于](/uploads/image/z/5249297-65-7.jpg?t=%E8%8B%A5%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%28-1.3%29%2C%E5%88%99m%E7%AD%89%E4%BA%8E)
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若开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1.3),则m等于
若开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1.3),则m等于
若开口向下的抛物线y=(m²-2)x²+2mx+1的对称轴经过点(-1.3),则m等于
带入-1,3得出m的值,又又因为开口向下,所以m2-2<0排除一个m值