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函数f(x)=x2+bx的图象在点A(1,f(1))处的切线与直线3x-y+2=...
函数f(x)=x
2+bx的图象在点A(1,f(1))处的切线与直线3x-y+2=0平行,若数列{
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}的前n项和为S
n,则S
2012的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882537305/SYS201311031024298825373008_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882537305/SYS201311031024298825373008_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882537305/SYS201311031024298825373008_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429882537305/SYS201311031024298825373008_ST/4.png)
考点分析:
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