共50条信息
已知函数\(f(x)=x^{2}+2bx\)的图象在点\(A(0,f(0))\)处的切线\(l\)与直线\(x+y+3=0\)垂直,若数列\(\{\dfrac{1}{f\left(n\right)} \}\)的前\(n\)项和为\(S_{n}\),则\(S_{2011}\)的值为\((\) \()\)
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