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已知函数地f(x)=3x+cos2x+sin2x且是f(x)的导函数,则过曲线y...
已知函数地f(x)=3x+cos2x+sin2x且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100940291235617/SYS201311031009402912356003_ST/0.png)
是f(x)的导函数,则过曲线y=x
3上一点P(a,b)的切线方程为( )
A.3x-y-2=0
B.4x-3y+1=0
C.3x-y-2=0或3x-4y+1=0
D.3x-y-2=0或4x-3y+1=0
考点分析:
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=(1,0),
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B.k=1且c与d反向
C.k=-1且c与d同向
D.k=-1且c与d反向
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