已知二次函数y=-1/2x²-x+2/3.(1)在给定的直角坐标系中,画出这个函数的图象.(这道图你可不画)(2)根据图像,写出当y<0时,x的取值范围.(3)若将此图像沿x轴向右平移3个单位,请写出平移
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![已知二次函数y=-1/2x²-x+2/3.(1)在给定的直角坐标系中,画出这个函数的图象.(这道图你可不画)(2)根据图像,写出当y<0时,x的取值范围.(3)若将此图像沿x轴向右平移3个单位,请写出平移](/uploads/image/z/474149-29-9.jpg?t=%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3D-1%2F2x%26%23178%3B-x%2B2%2F3.%EF%BC%881%EF%BC%89%E5%9C%A8%E7%BB%99%E5%AE%9A%E7%9A%84%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E7%94%BB%E5%87%BA%E8%BF%99%E4%B8%AA%E5%87%BD%E6%95%B0%E7%9A%84%E5%9B%BE%E8%B1%A1.%EF%BC%88%E8%BF%99%E9%81%93%E5%9B%BE%E4%BD%A0%E5%8F%AF%E4%B8%8D%E7%94%BB%EF%BC%89%282%29%E6%A0%B9%E6%8D%AE%E5%9B%BE%E5%83%8F%2C%E5%86%99%E5%87%BA%E5%BD%93y%EF%BC%9C0%E6%97%B6%2Cx%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.%EF%BC%883%EF%BC%89%E8%8B%A5%E5%B0%86%E6%AD%A4%E5%9B%BE%E5%83%8F%E6%B2%BFx%E8%BD%B4%E5%90%91%E5%8F%B3%E5%B9%B3%E7%A7%BB3%E4%B8%AA%E5%8D%95%E4%BD%8D%2C%E8%AF%B7%E5%86%99%E5%87%BA%E5%B9%B3%E7%A7%BB)
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