求函数f(x)=x^2+2(10-3n)x+9n^2-61n+100的顶点横坐标成等差数列an第二问 函数图像顶点到y轴距离成Bn 求Bn的前n项和
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![求函数f(x)=x^2+2(10-3n)x+9n^2-61n+100的顶点横坐标成等差数列an第二问 函数图像顶点到y轴距离成Bn 求Bn的前n项和](/uploads/image/z/6961239-63-9.jpg?t=%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E2%2B2%2810-3n%29x%2B9n%5E2-61n%2B100%E7%9A%84%E9%A1%B6%E7%82%B9%E6%A8%AA%E5%9D%90%E6%A0%87%E6%88%90%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97an%E7%AC%AC%E4%BA%8C%E9%97%AE+%E5%87%BD%E6%95%B0%E5%9B%BE%E5%83%8F%E9%A1%B6%E7%82%B9%E5%88%B0y%E8%BD%B4%E8%B7%9D%E7%A6%BB%E6%88%90Bn+%E6%B1%82Bn%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C)
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