已知函数f(x)=x³+bx的图像在点A(1,f(1))处的斜率为3.数列﹛1/f(n)﹜(n∈N*)的前N项和为Sn则S2009的值
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![已知函数f(x)=x³+bx的图像在点A(1,f(1))处的斜率为3.数列﹛1/f(n)﹜(n∈N*)的前N项和为Sn则S2009的值](/uploads/image/z/11484296-8-6.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dx%26%23179%3B%2Bbx%E7%9A%84%E5%9B%BE%E5%83%8F%E5%9C%A8%E7%82%B9A%EF%BC%881%2Cf%281%29%29%E5%A4%84%E7%9A%84%E6%96%9C%E7%8E%87%E4%B8%BA3.%E6%95%B0%E5%88%97%EF%B9%9B1%2Ff%28n%29%EF%B9%9C%28n%E2%88%88N%2A%29%E7%9A%84%E5%89%8DN%E9%A1%B9%E5%92%8C%E4%B8%BASn%E5%88%99S2009%E7%9A%84%E5%80%BC)
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已知函数f(x)=x³+bx的图像在点A(1,f(1))处的斜率为3.数列﹛1/f(n)﹜(n∈N*)的前N项和为Sn则S2009的值
已知函数f(x)=x³+bx的图像在点A(1,f(1))处的斜率为3.数列﹛1/f(n)﹜(n∈N*)的前N项和为Sn
则S2009的值
已知函数f(x)=x³+bx的图像在点A(1,f(1))处的斜率为3.数列﹛1/f(n)﹜(n∈N*)的前N项和为Sn则S2009的值