将抛物线y=-2x^2-1向上平移若干个单位,使抛物线与坐标轴有三个交点,如果这些交点能构成直角三角形,那么平移的距离为?
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![将抛物线y=-2x^2-1向上平移若干个单位,使抛物线与坐标轴有三个交点,如果这些交点能构成直角三角形,那么平移的距离为?](/uploads/image/z/10307643-51-3.jpg?t=%E5%B0%86%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-2x%5E2-1%E5%90%91%E4%B8%8A%E5%B9%B3%E7%A7%BB%E8%8B%A5%E5%B9%B2%E4%B8%AA%E5%8D%95%E4%BD%8D%2C%E4%BD%BF%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8E%E5%9D%90%E6%A0%87%E8%BD%B4%E6%9C%89%E4%B8%89%E4%B8%AA%E4%BA%A4%E7%82%B9%2C%E5%A6%82%E6%9E%9C%E8%BF%99%E4%BA%9B%E4%BA%A4%E7%82%B9%E8%83%BD%E6%9E%84%E6%88%90%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E9%82%A3%E4%B9%88%E5%B9%B3%E7%A7%BB%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA%3F)
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