已知二次函数y=ax^2+bx+c经过点(0,0),导函数f'(x)=2x+1,当x∈[n,m+1],(n∈N*)时,f(x)是整数的个数记为an(1)球a、b、c的值;(2)求数列{an}的通项公式;(3)令bn=2/an*a(n+1),球{bn}的前n项和Sn已知二次函
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![已知二次函数y=ax^2+bx+c经过点(0,0),导函数f'(x)=2x+1,当x∈[n,m+1],(n∈N*)时,f(x)是整数的个数记为an(1)球a、b、c的值;(2)求数列{an}的通项公式;(3)令bn=2/an*a(n+1),球{bn}的前n项和Sn已知二次函](/uploads/image/z/10289385-9-5.jpg?t=%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dax%5E2%2Bbx%2Bc%E7%BB%8F%E8%BF%87%E7%82%B9%280%2C0%29%2C%E5%AF%BC%E5%87%BD%E6%95%B0f%27%28x%29%3D2x%2B1%2C%E5%BD%93x%E2%88%88%5Bn%2Cm%2B1%5D%2C%28n%E2%88%88N%2A%29%E6%97%B6%2Cf%28x%29%E6%98%AF%E6%95%B4%E6%95%B0%E7%9A%84%E4%B8%AA%E6%95%B0%E8%AE%B0%E4%B8%BAan%EF%BC%881%EF%BC%89%E7%90%83a%E3%80%81b%E3%80%81c%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%EF%BC%9B%EF%BC%883%EF%BC%89%E4%BB%A4bn%3D2%2Fan%2Aa%28n%2B1%29%2C%E7%90%83%7Bbn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CSn%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD)
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